@article{MT_2019_22_1_a4,
     author = {K. Zh. Kudaǐbergenov},
     title = {Rank functions for stable diagrams},
     journal = {Matemati\v{c}eskie trudy},
     pages = {119--126},
     year = {2019},
     volume = {22},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2019_22_1_a4/}
}