共 7 条
[2]
BINZ E, 1968, MATH ANN, V175, P169
[4]
COOK CH, 1965, MATH ANN, V159, P94
[5]
KENT DC, 1973, CZECH MATH J, V23, P437
[6]
SCHRODER M, TO BE PUBLISHED
[7]
WINGREN C, 1973, ACTA ACAD ABOENSIS B, V33, P1