Workshop on Numerical Techniques for Systems Engineering Problems Lexington, Ky., Sorensen, D. C., & Wets, R. J. (1982). Nondifferential and variational techniques in optimization: Proceedings of the Workshop on Numerical Techniques for Systems Engineering Problems, part 2. North-Holland Pub. Co., ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co..

Workshop on Numerical Techniques for Systems Engineering Problems Lexington, Ky., D. C. Sorensen, and Roger J.-B Wets. Nondifferential and Variational Techniques in Optimization: Proceedings of the Workshop on Numerical Techniques for Systems Engineering Problems, Part 2. Amsterdam ; New York : New York: North-Holland Pub. Co., ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1982.

Workshop on Numerical Techniques for Systems Engineering Problems Lexington, Ky., et al. Nondifferential and Variational Techniques in Optimization: Proceedings of the Workshop on Numerical Techniques for Systems Engineering Problems, Part 2. North-Holland Pub. Co., ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co., 1982.