@BOOK{korov2,
  AUTHOR =       {F. Altomare and M. Campiti},
  TITLE =        {{Korovkin-Type Approximation Theory and Its Applications.}},
  PUBLISHER =    {de Gruyter Studies in Mathematics, 17},
  YEAR =         {1994},
  address =      {alter de Gruyter \& Co., Berlin},
}

@ARTICLE{adell,
  AUTHOR =       {J.A. Adell, F.G. Bad\'{i}a and J. de la Cal},
  TITLE =        {{Beta-type operators preserve shape properties.}},
  JOURNAL =      {Stoch. Proc. Appl.},
  YEAR =         {1993},
  volume =       {48},
  pages =        {1-8},
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@ARTICLE{aral1,
  AUTHOR =       {A. Aral},
  TITLE =        {{A generalization of Sz\'{a}sz-Mirakyan operators based on $q$-integers.}},
  JOURNAL =      {Math. Comput. Model.},
  YEAR =         {2008},
  volume =       {47},
  pages =        {1052-1062},
}

@ARTICLE{bern1,
  AUTHOR =       {S.N. Bernstein},
  TITLE =        {{D\'{e}monstration du th\'{e}or\'{e}me de Weierstrass fond\'{e}e sur le calcul des probabilit\'{e}s.}},
  JOURNAL =      {Commun. Soc. Math. Kharkow},
  YEAR =         {1912},
  volume =       {2},
  pages =        {1-2},
}

@ARTICLE{cheikh,
  AUTHOR =       {Y. Ben Cheikh, M. Gaied and A. Zaghouani},
  TITLE =        {{q-Dunkl-classical q-Hermite type polynomials.}},
  JOURNAL =      {Georgian Math. J.},
  YEAR =         {2014},
  volume =       {21},
  pages =        {125-137},
}

@ARTICLE{cekim1,
  AUTHOR =       { \"{U}. Dinlemez, B. \c{C}ekim and \.{I}. Y\"{u}ksel},
  TITLE =        {{Dunkl generalization of  Sz\'{a}sz-beta type operators.}},
  JOURNAL =      {Math. Meth. Appl. Sci.},
  YEAR =         {(accepted for publication)},
}

@ARTICLE{korovkin1,
  AUTHOR =       {A.D. Gadzhiev},
  TITLE =        {{The convergence problem for a sequence of positive linear operators on unbounded sets and theorems analogous to that of P.P. Korovkin.}},
  JOURNAL =      {Sov. Math. Dokl.},
  YEAR =         {1974},
  volume =       {15},
  pages =        {1433-1436},
}

@ARTICLE{mahmudov3,
  AUTHOR =       {V. Gupta and N.I. Mahmudov},
  TITLE =        {{Approximation properties of the $q$-Sz\'{a}sz-Mirakyan-Beta operators.}},
  JOURNAL =      {Indian J. Ind. Appl. Math.},
  YEAR =         {2012},
  volume =       {3},
  pages =        {41-53},
}

@ARTICLE{vnm_mmas,
  AUTHOR =       {R.B. Gandhi, Deepmala and V.N. Mishra},
  TITLE =        {{Local and global results for modified Sz\'{a}sz - Mirakjan operators.}},
  JOURNAL =      {Math. Meth. Appl. Sci.},
  YEAR =         {2017},
  volume =       {40},
  number=         {7},
  pages =        {2491-2504},
}

@ARTICLE{vnm_nasa,
  AUTHOR =       {A.R. Gairola, Deepmala and L.N. Mishra},
  TITLE =        {{Rate of Approximation by Finite Iterates of $q$-Durrmeyer Operators.}},
  JOURNAL =      {Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci. (April-June 2016)},
  YEAR =         {2016},
  volume =       {86},
  pages =        {229-234},
}

@ARTICLE{icoz1,
  AUTHOR =       {G. \.{I}\c{c}\"{o}z and B. \c{C}ekim},
  TITLE =        {{Dunkl generalization of Sz\'{a}sz operators via $q$-calculus.}},
  JOURNAL =      {J. Inequal. Appl.},
  YEAR =         {2015},
  volume =       {2015},
  pages =        {11 pages},
}

@ARTICLE{icoz2,
  AUTHOR =       {G. \.{I}\c{c}\"{o}z and B. \c{C}ekim},
  TITLE =        {{Stancu type generalization of Dunkl analogue of Sz\'{a}sz-Kontorovich operators.}},
  JOURNAL =      {Math. Meth. Appl. Sci.},
  YEAR =         {2016},
  volume =       {39},
  pages =        {1803-1810},
}

@ARTICLE{jackson,
  AUTHOR =       {F.H. Jackson},
  TITLE =        {{On a $q$-definite integrals.}},
  JOURNAL =      {Quart. J. Pure Appl. Math.},
  YEAR =         {1910},
  volume =       {41},
  pages =        {193-203},
}

@ARTICLE{korov1,
  AUTHOR =       {P.P. Korovkin},
  TITLE =        {{On convergence of linear positive operators in the space of continuous functions.}},
  JOURNAL =      {Dokl. Akad. Nauk SSSR},
  YEAR =         {1953},
  volume =       {90},
  pages =        {961-964},
}

@ARTICLE{mahmudov1,
  AUTHOR =       {N.I. Mahmudov},
  TITLE =        {{On $q$-parametric Sz\'{a}sz-Mirakjan operators.}},
  JOURNAL =      {Mediterr. J. Math.},
  YEAR =         {2010},
  volume =       {7},
  pages =        {297-311},
}

@ARTICLE{mahmudov2,
  AUTHOR =       {N.I. Mahmudov},
  TITLE =        {{Approximation by the q-Sz\'{a}sz-Mirakjan Operators.}},
  JOURNAL =      {Abstr.  Appl. Anal.},
  YEAR =         {2012},
  volume =       {2012},
  pages =        {16 pages},
}

@ARTICLE{vnm_jia,
  AUTHOR =       {V.N. Mishra, K. Khatri, L.N. Mishra and Deepmala},
  TITLE =        {{Inverse result in simultaneous approximation by Baskakov-Durrmeyer-Stancu operators.}},
  JOURNAL =      {J. Inequal. Appl.},
  YEAR =         {2013},
  volume =       {2013},
  pages =        {586, doi: 10.1186/1029-242X-2013-586},
}

@ARTICLE{phillips,
  AUTHOR =       {G.M. Phillips},
  TITLE =        {{Bernstein polynomials based on the $q$-integers.}},
  JOURNAL =      {Ann. Numer. Math.},
  YEAR =         {1997},
  volume =       {4},
  pages =        {511-518},
}

@ARTICLE{radu,
  AUTHOR =       {C. Radu},
  TITLE =        {{On statistical approximation of a general class of positive linear operators extended in $q$-calculus.}},
  JOURNAL =      {Appl. Math. Comput.},
  YEAR =         {2009},
  volume =       {215},
  pages =        {2317-2325},
}

@ARTICLE{rosenblum,
  AUTHOR =       {M. Rosenblum},
  TITLE =        {{Generalized Hermite polynomials and the Bose-like oscillator calculus.}},
  JOURNAL =      {Oper.Theory Adv. Appl.},
  YEAR =         {1994},
  volume =       {73},
  pages =        {369-396},
}

@ARTICLE{desole,
  AUTHOR =       {A. De Sole and V.G. Kac},
  TITLE =        {{On integral representation of $q$-gamma and $q$-beta functions.}},
  JOURNAL =      {Atti. Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei (9) Mat. Appl.},
  YEAR =         {2005},
  volume =       {16},
  pages =        {11-29},
}

@ARTICLE{szasz1,
  AUTHOR =       {O. Sz\'{a}sz},
  TITLE =        {{Generalization of S. Bernstein's polynomials to the infinite interval.}},
  JOURNAL =      {J. Res. Nat. Bur. Stand.},
  YEAR =         {1950},
  volume =       {45},
  pages =        {239-245},
}

@BOOK{szego,
  AUTHOR =       {G. Sz\"{e}go},
  TITLE =        {{Orthogonal polynomials.}},
  PUBLISHER =    {Amer. Math. Soc. Colloq. Publ., 23},
  YEAR =         {1959},
  address =      {Providence R.I.},
}

@ARTICLE{sucu,
  AUTHOR =       {S. Sucu},
  TITLE =        {{Dunkl analogue of Sz\'{a}sz operators.}},
  JOURNAL =      {Appl. Math. Comput.},
  YEAR =         {2014},
  volume =       {244},
  pages =        {42-48},
}

@ARTICLE{vnm_ems,
  AUTHOR =       {V.N. Mishra, P. Sharma, L.N. Mishra},
  TITLE =        {{On statistical approximation properties of $q-$Baskakov-Sz\'{a}sz-Stancu operators.}},
  JOURNAL =      {J. Egyptian Math. Soc.},
  YEAR =         {2016},
  volume =       {24},
  number=        {3},
  pages =        {396-401},
}

@ARTICLE{vnm_ist,
  AUTHOR =       {A.R. Gairola, Deepmala, L.N. Mishra},
  TITLE =        {{On the $q-$derivatives of a certain linear positive operators.}},
  JOURNAL =      {Iranian J. Sci. Tech., Transactions A: Science},
  YEAR =         {2017},
  volume =       {DOI 10.1007/s40995-017-0227-8},
}
  
@ARTICLE{vnm_ade,
  AUTHOR =       {V.N. Mishra, K. Khatri, L.N. Mishra},
  TITLE =        {{Statistical approximation by Kantorovich type Discrete $q-$Beta operators.}},
  JOURNAL =      {Adv. Difference Equ.},
  YEAR =         {2013},
  volume =       {2013},
  pages =        {345, DOI: 10.1186/10.1186/1687-1847-2013-345},
}