@article{CHEB_2017_18_2_a5,
     author = {N. M. Dobrovol'skii and N. N. Dobrovol'skii and D. K. Sobolev and V. N. Soboleva},
     title = {Classification purely real algebraic irrationalities},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {98--128},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2017_18_2_a5/}
}