@article{ZNSL_1995_224_a6,
     author = {A. A. Andrianov and M. V. Ioffe and D. N. Nishnianidze},
     title = {Higher-order supersymmetry in quantum mechanics and integrability of two-dimensional {Hamiltonians}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {68--80},
     publisher = {mathdoc},
     volume = {224},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_224_a6/}
}