GRAY, KEN; STREET, ANNE PENFOLD; HARRIS, KAREN; RAMSAY, COLIN. Existence of complementary pairs of proportionally balanced designs. Utilitas Mathematica , [S. l.], v. 67, 2005. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/371. Acesso em: 8 may. 2026.