@article{VUU_2019_29_4_a7,
     author = {A. G. Chentsov and E. G. Pytkeev},
     title = {Constraints of asymptotic nature and attainability problems},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {569--582},
     year = {2019},
     volume = {29},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VUU_2019_29_4_a7/}
}