1. Elementary Matrix and Some Applications to Dynamics and Differential Equations;Frazer,1946
2. Differential Equations;Hirsch,1974
3. Linear Systems;Kailath,1980
4. Nineteen dubious ways to compute the exponential of a matrix;Moler;SIAM Rev.,1978
5. Numerical Solution of Partial Differential Equations: Finite Difference Methods;Smith,1985