共 5 条
[1]
Kurosh A.G, 1953, MAT SB, V33, P13
[3]
van Leeuwen L. C. A., 1977, Journal of the Australian Mathematical Society, Series A (Pure Mathematics), V23, P172
[4]
VANLEEUWEN LCA, UNPUB ACTA MATH ACAD
[5]
WIEGANDT R, 1978, LIST PROBLEMS K ALGE, P6