@article{01208824,
title = {The problem of optimal control for nonlinear systems with variable structure, delays and piecewise continuous prehistory.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {12},
year = {1997},
pages = {67-88},
zbl = {0906.49014},
language = {en},
url = {http://dml.mathdoc.fr/item/01208824}
}
Kharatishvili, Guram L.; Tadumadze, Tamaz A. The problem of optimal control for nonlinear systems with variable structure, delays and piecewise continuous prehistory.. Memoirs on Differential Equations and Mathematical Physics, Tome 12 (1997) pp. 67-88. http://gdmltest.u-ga.fr/item/01208824/