Sorensen, D.C,; Wets, R.J.B, (eds.): Nondifferential and Variational Techniques in Optimization. Proceedings of the Workshop on Numerical Techniques for Systems Engineering Problems. Part 2. Mathematical Programming Studies 17. North-Holland Publ. Comp. Amsterdam, New York 1982, X, 160 p., Dfl. 60.00. ISBN-0444863923