@article{DAN_1976_228_2_a20,
     author = {V. A. Ibragimov},
     title = {Invariant integral in the theory of cracks for elastic-plastic media},
     journal = {Doklady Akademii Nauk},
     pages = {335--337},
     publisher = {mathdoc},
     volume = {228},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_228_2_a20/}
}