Title: The index of extremality and quasiextremal controls
Authors: A.A. Agrachev, R.V. Gamkrelidze
Journal title: Dokl. Acad. Nauk SSSR
Year: 1985
Issue: 4
Volume: 284
Pages: 777-781
File:
Download
MathNet (ENG):
http://mi.mathnet.ru/eng/dan8940