共 5 条
[2]
JANS JP, 1969, J LONDON MATH SOC, V1, P588
[3]
Rosenberg A., 1959, MATH Z, V70, P372
[4]
SANDOMIERSKI F, 1971, MAR P RING THEOR C S
[5]
VAMOS P, 1968, J LONDON MATH SOC, V43, P643