共 7 条
[1]
DAHO K, 1977, P ROY SOC EDINB A, V78, P161, DOI 10.1017/S0308210500009914
[4]
Freiling G., 2001, Inverse Sturm-Liouville problems and their applications
[5]
McHugh J., 1970, ARCH HIST EXACT SCI, V7, P277
[6]
Wasow W., 1985, LINEAR TURNING POINT, DOI DOI 10.1007/978-1-4612-1090-0
[7]
Yurko V.A., 2002, METHOD SPECTRAL MAPP