共 8 条
[1]
[Anonymous], 1958, MATH SCAND
[3]
Colbourn CJ, 1996, J COMB DES, V4, P205
[4]
MINIC M, 1997, THESIS MIDDLE STATE
[5]
Peltesohn R., 1939, COMPOS MATH, V6, P251
[7]
Rosa A., 1966, Mat.-Fyz. Casopis Sloven. Akad. Vied, V16, P285
[8]
Skolem T., 1957, Mathematica Scandinavica, V5, P57