共 7 条
[1]
Atkinson FV., 1964, DISCRETE CONTINUOUS
[2]
Berezanskii J.M., 1968, EXPANSIONS EIGENFUNC, V17
[3]
FORT T, 1948, FINITE DIFFERENCES D
[4]
Glazman I. M., 1963, DIRECT METHODS QUALI
[6]
MCCARTHY PJ, 1959, PORT MATH, V18, P203
[7]
Naimark M.A., 1968, LINEAR DIFFERENTIAL