@article{FAA_1982_16_3_a2,
     author = {L. M. Berkovich},
     title = {Transformation of {Sturm{\textendash}Liouville} differential equations},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {42--44},
     year = {1982},
     volume = {16},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1982_16_3_a2/}
}