@article{MZM_2015_97_1_a2,
     author = {V. V. Bulankina and A. B. Kupavskii and A. A. Polyanskii},
     title = {On {Schur's} {Conjecture} in $\mathbb R^4$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {23--34},
     publisher = {mathdoc},
     volume = {97},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2015_97_1_a2/}
}