共 8 条
[2]
Baumslag G., 1962, MATH Z, V78, P423
[3]
Baumslag G., 1963, T AM MATH SOC, V106, P193
[4]
HIGMAN G, 1951, J LOND MATH SOC, V26, P59
[5]
MAYLAND EJ, 1971, THESIS U WISCONSIN
[6]
MILLER CF, 1971, 68 PRINC U ANN MATH
[7]
NEUWIRTH LP, 1965, 56 PRINC U ANN MATH