Sufficient conditions for Lagrange, Mayer, and Bolza optimization problems. Boltyanski, V. — 2001 Mathematical Problems in Engineering
Optimal synthesis for nonoscillatory controlled objects. Boltyanski, V.; Gorelikova, S. — 1997 Journal of Applied Analysis
Fixing and hindering systems in combinatorial geometry. Boltyanski, V.; Martini, H. — 1999 Beiträge zur Algebra und Geometrie