A.A. Agrachev, S.A. Vakhrameev, Nonlinear control systems of constant rank and bang-bang conditions for extremal controls

Title: Nonlinear control systems of constant rank and bang-bang conditions for extremal controls
Authors: A.A. Agrachev, S.A. Vakhrameev
Journal title: Dokl. Acad. Nauk SSSR
Year: 1984
Volume: 279
Pages: 265-269