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@article{IVM_1999_6_a8, author = {B. F. Samsonov}, title = {On the $N$-th order {Darboux} transformation}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {65--68}, publisher = {mathdoc}, number = {6}, year = {1999}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1999_6_a8/} }
B. F. Samsonov. On the $N$-th order Darboux transformation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1999), pp. 65-68. http://geodesic.mathdoc.fr/item/IVM_1999_6_a8/