TY - JOUR AU - Berkovich, L. M. AU - Rozov, N. H. TI - Transformations of linear differential equations of second order and adjoined nonlinear equations JO - Archivum mathematicum PY - 1997 SP - 75 EP - 98 VL - 33 IS - 1-2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_1997__33_1-2_a9/ LA - en ID - ARM_1997__33_1-2_a9 ER -