@article{MZM_1992_51_2_a12,
     author = {L. A. Skornyakov},
     title = {Subchain semirelatives},
     journal = {Matemati\v{c}eskie zametki},
     pages = {88--100},
     year = {1992},
     volume = {51},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_2_a12/}
}