共 22 条
[3]
COPPEL WA, 1971, LECTURE NOTES MATH, V220
[4]
ELOE PW, IN PRESS RECENT TREN, V1
[6]
Hankerson D., 1990, APPL ANAL, V39, P193
[8]
JACKSON LK, 1977, MAA STUDIES MATH, V14
[10]
Kiguradze I. T., 1975, SOME SINGULAR BOUNDA