@article{DM_1990_2_2_a0,
     author = {A. A. Markov},
     title = {Systems of equations of the antiprefix property in words},
     journal = {Diskretnaya Matematika},
     pages = {3--15},
     year = {1990},
     volume = {2},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_2_a0/}
}