State variable difference methods for digital simulation

J.M. Hurt A new difference equation technique for solving nonlinear differential equations AFIPS Conference Proceedings vol 25 pp 169-179 1964

M.E. Fowler A new numerical method for simulation SIMULATION vol 4 no 5 pp 324-330 May 1965

E.G. Gilbert Some critical remarks on a new numerical method for simulation of dynamic systems SIMULATION vol 6 no 2 February 1966

J.L. Hammond JR Application of state variable techniques in analog computer programming SIMULATION vol 4 no 5 May 1950

C.E. Treanor A method for the numerical integration of coupled first-order differential equations with greatly different time constants Mathematics of Computation vol 20 pp 39-45 January 1966

P.R. Benyon Letter to the Editor SIMULATION pp vvi vol 6 no 6 June 1966