@article{ARM_1997__33_1-2_a9,
     author = {Berkovich, L. M. and Rozov, N. H.},
     title = {Transformations of linear differential equations of second order and adjoined nonlinear equations},
     journal = {Archivum mathematicum},
     pages = {75--98},
     publisher = {mathdoc},
     volume = {33},
     number = {1-2},
     year = {1997},
     mrnumber = {1464303},
     zbl = {0914.34035},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1997__33_1-2_a9/}
}