共 9 条
- [1] ARFKEN G, 1970, MATH METHODS PHYSICS, P370
- [2] ARFKEN G, 1970, MATH METHODS PHYSICS, P715
- [4] DORF R, 1986, MODERN CONTROL SYSTE, P319
- [5] DRIVER D, 1977, ORDINARY DELAY DIFFE, P253
- [6] ELSGOLTS LE, 1973, INTRO THEORY APPLICA, P243
- [9] MAY RM, 1983, SUMM P LEW HOUCH SCH