References
- Ince , EL . 1956 . Ordinary Differential Equations , Dover : unaltered republication of the first edition published in 1926 by Longmans, Green and Co. .
- Nagle , RK , Saff , EB and Snider , AD . 2004 . Fundamentals of Differential Equations, , 6th cedn , Boston : Pearson/Addison-Wesley .
- Apostol , TM . 1974 . Mathematical Analysis, , 2nd edn , Reading, MA : Addison-Wesley .
- Ford , LR . 1955 . Differential Equations, , 2nd edn , New York : McGraw-Hill .
- Dobbs , DE . 2004 . Solution sets determine differential equations . International Journal of Mathematical Education in Science and Technology , 35 : 767 – 772 .