@article{MAT_1957_1_2_a4,
     author = {K. O. Friedrichs},
     title = {Asymptotic phenomena in mathematical physics},
     journal = {Matematika},
     pages = {79--94},
     year = {1957},
     volume = {1},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1957_1_2_a4/}
}