共 22 条
[2]
BAHRI A, IN PRESS EXISTENCE P
[6]
EGNELL H, 1990, 1988 P C VAR PROBL P, P61
[7]
Fowler R. H., 1931, MON NOT R ASTRON SOC, V2, P258, DOI DOI 10.1093/QMATH/OS-2.1.259
[9]
Gidas B., 1981, ADV MATH SUPPLEMEN A, P369
[10]
GILBARG D, 1983, ELLIPTIC PARTIAL DIF