On the Symmetric Block Design with Parameters (210,77,28) Admitting a Frobenius Group of Order 57. Eur. J. Pure Appl. Math. [Internet]. 2020 Jul. 31 [cited 2024 May 2];13(3):608-19. Available from: https://www.ejpam.com/index.php/ejpam/article/view/3769