共 12 条
[3]
KUROSH KA, 1955, THEORY GROUPS, V2
[4]
Murasugi K., 1958, J MATH SOC JAPAN, V10, P235
[5]
Murasugi K., 1958, J MATH SOC JAPAN, V10, P235
[6]
NEUWIRTH L, 1959, THESIS PRINCETON U
[7]
PAPAKYRIAKOPOUL.CD, 1957, P LOND MATH SOC, V7, P281
[10]
SCHREIER O, 1926, ABH MATH SEM HAMBURG, V5, P161