共 82 条
[3]
AHLBRANDT CD, CANAD J MATH
[4]
Akhiezer N. I., 1962, CALCULUS VARIATIONS
[5]
Atkinson FV., 1964, DISCRETE CONTINUOUS
[6]
Barrett J.H., 1961, PAC J MATH, V1, P25, DOI 10.2140/pjm.1961.11.25
[8]
BARRETT JH, 1959, P AM MATH SOC, V10, P552
[9]
Birkhoff G., 1978, ORDINARY DIFFERENTIA