Non-existence of quasi-symmetric designs with restricted block graphs. - Rajendra M. Pawale; Mohan S. Shrikhande; Kusum S. Rajbhar (Des. Codes Cryptogr., 2022)

Non-existence of quasi-symmetric designs having certain pseudo-geometric block graphs. - Kusum S. Rajbhar; Rajendra M. Pawale (AKCE Int. J. Graphs Comb., 2024)