@article{DAN_1980_254_3_a3,
     author = {V. G. Zhadan},
     title = {On two classes of methods of solving nonlinear programming problems},
     journal = {Doklady Akademii Nauk},
     pages = {531--534},
     publisher = {mathdoc},
     volume = {254},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_254_3_a3/}
}