共 13 条
[2]
DARBOUX M, 1896, LECONS THEORIE SURFA, V4
[3]
DUFF GFD, 1959, CAN J MATH, V11, P195
[4]
DUFF GFD, 1957, CAN J MATH, V9, P141
[5]
GARDING L, 1949, 11 SCAND MATH C TRON
[6]
GOURSAT E, 1946, COURS ANALYSE MATHEM, V3
[7]
HADAMARD J, 1903, B SOC MATH FR, V31
[8]
Lions J.-L., 1961, EQUATIONS DIFFERENTI
[9]
NIRENBERG L, 1955, COMM PURE APPL MATH, V8, P647
[10]
PROTTER MH, 1954, ANN MATH STUDIES, P249