@article{DAN_1968_183_6_a1,
     author = {M. M. Vainberg},
     title = {The unconditional extremum of functionals and the convergence of minimizing sequences},
     journal = {Doklady Akademii Nauk},
     pages = {1243--1246},
     publisher = {mathdoc},
     volume = {183},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_6_a1/}
}