@article{MO_1998_5_2_a0,
     author = {S. M. Nikol'skii},
     title = {In {Memory} of {L.} {S.} {Pontryagin}},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {3--6},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_1998_5_2_a0/}
}