共 20 条
[1]
Acharya FS, 2013, INT J MATH SCI APPL, V3, P207
[2]
[Anonymous], 2014, Int. J. Nonlinear Sci.
[8]
Fattorini H.O., 1985, 2 ORDER LINEAR DIFFE, V108
[10]
Hernández E, 2013, P AM MATH SOC, V141, P1641