@article{TM_1999_224_a1,
     author = {R. V. Gamkrelidze},
     title = {Mathematical {Work} of {L.} {S.~Pontryagin}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {14--27},
     year = {1999},
     volume = {224},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1999_224_a1/}
}