@article{DAN_1983_268_3_a1,
     author = {R. Gabasov and F. M. Kirillova and B. Mordukhovich},
     title = {The $\epsilon$-maximum principle for suboptimal controls},
     journal = {Doklady Akademii Nauk},
     pages = {525--529},
     publisher = {mathdoc},
     volume = {268},
     number = {3},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_268_3_a1/}
}