Ordinary Differential Equations (Odes) : Advanced Engineering Mathematics, 10/E by Edwin KreyszigSEBIN HAN
Fourier Analysis. Partial Differential Equations: Advanced Engineering Mathematics, 10/e by Edwin KreyszigElias Abou Fakhr
Sturm-Liouville Problems. Orthogonal Functions: Advanced Engineering Mathematics, 10/e by Edwin KreyszigElias Abou Fakhr