COOPER, JOAN; DONOVAN, DIANE; GOWER, REBECCA A. H. Critical sets in direct products of back circulant latin squares. Utilitas Mathematica , [S. l.], v. 50, 1996. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/29. Acesso em: 8 may. 2026.