@article{MT_1994_27_a3,
     author = {A. D. Korshunov},
     title = {On linear extensions of partially ordered sets},
     journal = {Matemati\v{c}eskie trudy},
     pages = {34--42},
     publisher = {mathdoc},
     volume = {27},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1994_27_a3/}
}