@article{ZNSL_1968_8_a15,
     author = {Yu. V. Matiyasevich},
     title = {Arithmetical representations of powers},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {159--165},
     publisher = {mathdoc},
     volume = {8},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1968_8_a15/}
}