共 7 条
[3]
EISENBERG E, 1961, P AM MATH SOC, V12, P783
[4]
Fan K., 1957, P AM MATH SOC, V8, P617, DOI DOI 10.1090/S0002-9939-1957-0087574-2
[5]
Hestenes MR., 1966, CALCULUS VARIATIONS