@article{DAN_1969_184_6_a13,
     author = {E. M. Morozov},
     title = {A variational principle in the mechanics of rupture},
     journal = {Doklady Akademii Nauk},
     pages = {1308--1311},
     publisher = {mathdoc},
     volume = {184},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_6_a13/}
}