共 9 条
[1]
Hartman P., 1952, AM J MATH, V74, P389
[2]
Kamenev I. V., 1978, Mat. Zametki, V23, P249
[5]
Li WT, 1999, INDIAN J PURE AP MAT, V30, P1017
[6]
PHILOS CG, 1989, ARCH MATH, V53, P489
[7]
WANG QR, 2001, ACTA MATH SINICA, V44, P371
[8]
WONG JSW, 1968, FUNKC EKVACIOJ-SER I, V11, P207