@article{IIGUM_2010_3_3_a9,
     author = {V. A. Terletsky and E. A. Lutkovskaya},
     title = {Variational maximum principle in the problem of optimal control of nonlinear wave processes},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {105--117},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2010_3_3_a9/}
}