* Example problems with solutions at exampleproblems.com* المعادلات التفاضلية الجزئية at mathworld.wolfram.com* Dispersive PDE Wiki* NEQwiki, the nonlinear equations encyclopedia
* Partial Differential Equations in Cleve Moler: Numerical Computing with MATLAB* Example problems with solutions at exampleproblems.com* Partial Differential Equations at mathworld.wolfram.com* Partial Differential Equations at nag.com* Dispersive PDE Wiki* NEQwiki, the nonlinear equations encyclopedia