@article{ZNSL_2007_347_a12,
     author = {A. V. Sokolov},
     title = {Factorization of nonlinear supersymmetry in one-dimensional quantum {mechanics~II:} proofs of theorems on reducibility},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {214--237},
     publisher = {mathdoc},
     volume = {347},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2007_347_a12/}
}