共 11 条
[1]
CROWELL RH, 1959, ANNALS MATHEMATICS, V69, P259
[2]
CROWELL RM, TO BE PUBLISHED
[4]
Murasugi K., 1960, OSAKA MATH J, V12, P277
[7]
Reidemeister K., 1932, KNOTENTHEORIE
[8]
SCHUBERT H, 1949 M HEID AK WISS, P57
[9]
Seifert H., 1935, MATH ANN, V110, P571
[10]
Whitehead JHC, 1939, P LOND MATH SOC, V45, P243