QIAN Y.; MENG, ZHAOPING; DU, BEILIANG. α-resolvable group divisible designs with block size four and group size three. Utilitas Mathematica , [S. l.], v. 77, 2008. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/530. Acesso em: 8 may. 2026.