共 9 条
[1]
Birman M. Sh., 1961, MAT SBORNIK, V55, P125
[2]
Glazman I. M., 1963, DIRECT METHODS QUALI
[3]
MITRINOVIC DS, 1970, ANALYTIC INEQUALITIE
[4]
MULLERPFEIFFER E, 1970, STUD MATH, V34, P183
[6]
Naimark M. A., 1968, LINEAR DIFFERENTIAL
[7]
Schechter M., 1971, SPECTRA PARTIAL DIFF
[9]
Yafaev D.R., 1972, TOPICS MATH PHYSICS, V5, P107