共 6 条
[1]
[Anonymous], 1964, PROBLEMS MODERN MATH
[2]
Fa V.A., 2010, J MATH ANAL APPL, V364
[3]
Forti G.L., 1995, AEQUATIONES MATH, V50
[4]
Hyers D. H., 1998, PROGR NONLINEAR DIFF, V34