@article{TMF_2009_159_3_a7,
     author = {P. G. Estevez},
     title = {Reciprocal transformations for a~spectral problem in $2+1$ dimensions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {411--417},
     publisher = {mathdoc},
     volume = {159},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_159_3_a7/}
}