Current problems of mathematics : differential equations, mathematical analysis and their applications : collection of papers dedicated to akademician Lev Semenovich Pontryagin on his seventy-fifth birthday
editorial board of the anniversary collection: editor in chief: A. A. Logunov, members of the board: R. V. Gamkrelidze, K. I. Oskolkov and V. I. Blagodatskikh
Bok Engelsk 1986