共 16 条
[1]
BAUER FL, 1969, LINEAR ALGEBRA APPL, V2, P275
[3]
LINEAR 2ND-ORDER DIFFERENTIAL EQUATIONS OF POSITIVE TYPE
[J].
JOURNAL D ANALYSE MATHEMATIQUE,
1967, 18
:43-&
[5]
BIRKHOFF G, 1965, J MATH MECH, V14, P507
[6]
Birkhoff G, 1962, T AM MATH SOC, V104, P37
[7]
BUSHELL PJ, 1972, J LOND MATH SOC, V5, P235
[8]
BUSHELL PJ, 1963, J LONDON MATH SOC, V6, P256
[9]
BUSHELL PJ, TO BE PUBLISHED
[10]
Hilbert D., 1895, MATH ANN, V46, P91, DOI DOI 10.1007/BF02096204