@article{SM_2013_204_4_a3,
     author = {Yu. V. Egorov},
     title = {On {Euler's} problem},
     journal = {Sbornik. Mathematics},
     pages = {539--562},
     publisher = {mathdoc},
     volume = {204},
     number = {4},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2013_204_4_a3/}
}