@article{DM_1992_4_2_a13,
     author = {M. I. Tikhomirova},
     title = {Asymptotic normality of the number of nonappearing $s$-chains},
     journal = {Diskretnaya Matematika},
     pages = {122--129},
     year = {1992},
     volume = {4},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1992_4_2_a13/}
}