@article{ZNSL_2006_335_a1,
     author = {A. A. Andrianov and A. V. Sokolov},
     title = {Factorization of nonlinear supersymmetry in one-dimensional {Quantum} {Mechanics~I:
}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {22--49},
     publisher = {mathdoc},
     volume = {335},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2006_335_a1/}
}