@article{VMUMM_1988_1_a20,
     author = {S. V. Yushmanov},
     title = {$m$-convexity and the centers of chordal graphs},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {78--80},
     publisher = {mathdoc},
     number = {1},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_1_a20/}
}