@article{DAN_1968_183_6_a3,
     author = {E. S. Levitin},
     title = {Necessary and sufficient conditions under which a given sequence is minimizing},
     journal = {Doklady Akademii Nauk},
     pages = {1250--1253},
     publisher = {mathdoc},
     volume = {183},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_6_a3/}
}