@article{VMUMM_2004_3_a1,
     author = {S. I. Bogataya and S. A. Bogatyi},
     title = {Power means. {New} descriptions of a barycenter and {Fermat--Torricelli} points},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {7--12},
     publisher = {mathdoc},
     number = {3},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2004_3_a1/}
}