共 5 条
[1]
ELSGOLE LE, 1961, CALCULUS VARIATIONS, P153
[2]
HILDEBRAND FB, 1952, METHODS APPLIED MATH, P120
[3]
JANSSEN TL, 1970, THESIS WICHITA STATE
[4]
KARMAN TVV, 1940, MATHEMATICAL METHODS, P353
[5]
SOKOLNIKOFF IS, 1941, HIGHER MATH ENG PHYS, P163