共 13 条
[4]
BRENNER JL, 1956, ARCH MATH, V7, P274
[6]
DIAZ JB, 1966, P AM MATH SOC, V17, P88
[7]
GEIRINGER H, 1948, SOLUTION SYSTEMS LIN, P365
[8]
GIBSON PM, 1966, P AM MATH SOC, V17, P535