@article{RM_1967_22_5_a20,
     author = {F. A. Medvedev},
     title = {N. {I.~Pesin,} {Development} of the concept of integral (review)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1967},
     volume = {22},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1967_22_5_a20/}
}