Emmett A. Witmer

Stability of the De Vogelaere method for timewise numerical integration.

E. A. Witmer, R. W. Wu, R. W.-H. Wu, 1973 .

An Improved Numerical Calculation Technique for Large Elastic-Plastic Transient Deformations of Thin Shells: Part 2—Evaluation and Applications

L. Morino, J. Leech, E. Witmer, 1971 .