@article{DAN_1967_176_3_a12,
     author = {A. S. Fokht},
     title = {A lemma from the calculus of variations and its application to embedding theorems},
     journal = {Doklady Akademii Nauk},
     pages = {536--537},
     publisher = {mathdoc},
     volume = {176},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_3_a12/}
}