@article{MZM_2003_73_5_a11,
     author = {O. D. Frolkina},
     title = {Inverse {Spectra} with {Two} and {Three} {Maps}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {753--758},
     publisher = {mathdoc},
     volume = {73},
     number = {5},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_5_a11/}
}