共 10 条
[1]
Banks D., 1963, P AM MATH SOC, V5, P823
[2]
Glazman I. M., 1963, DIRECT METHODS QUALI
[4]
HEADLEY VB, 1970, P AM MATH SOC, V21, P824
[7]
KREITH K, 1964, P AM MATH SOC, V15, P341
[8]
LEIGHTON W, 1952, J LOND MATH SOC, V27, P37
[9]
Nehari Z., 1957, T AM MATH SOC, V85, P428
[10]
NONOSCILLATION CRITERIA FOR ELLIPTIC EQUATIONS
[J].
CANADIAN MATHEMATICAL BULLETIN,
1969, 12 (03)
:275-&