共 9 条
[4]
CAFFARELLI L. A., 1987, Rev. Mat. Iberoamericana, V3, P139
[6]
DAHLBERG BEJ, 1977, ARCH RATIONAL MECH A, V65, P272
[7]
FABES EB, 1984, ATTI ACCAD NAZ LIN 8, V78, P1
[8]
FRIEDMAN A, 1982, VARIATIONAL PROBLEMS
[9]
KEMPER JT, 1972, TAMS, V167, P242