@article{VMJ_2008_10_1_a5,
     author = {D. V. Levchuk},
     title = {On the functions of {P.~Hall} on {Lie-type} groups of rank~1},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {37--39},
     year = {2008},
     volume = {10},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2008_10_1_a5/}
}