[W]-REFERENCIA-Paul Waltman (Auth.) - A Second Course in Elementary Differential Equations-Elsevier Inc, Academic Press (1986).pdf [C Y L] REFERENCIA-Earl A. Coddington, Norman Levinson - Theory of ordinary differential equations-R.E. Krieger (1984).pdf ![[W]-REFERENCIA-Paul Waltman (Auth.) - A Second Course in Elementary Differential Equations-Elsevier Inc, Academic Press (1986).pdf](https://cdn.slidesharecdn.com/ss_thumbnails/w-referencia-paulwaltmanauth-230516025940-c93e36a9-thumbnail.jpg?width=640&height=640&fit=bounds)
![[C Y L] REFERENCIA-Earl A. Coddington, Norman Levinson - Theory of ordinary differential equations-R.E. Krieger (1984).pdf](https://cdn.slidesharecdn.com/ss_thumbnails/cylreferencia-earla-230516025851-1d3bdc1f-thumbnail.jpg?width=640&height=640&fit=bounds)