@article{AL_1990_29_6_a0,
     author = {S. V. Varaksin},
     title = {Semilinear ordering for solvable and nilpotent groups},
     journal = {Algebra i logika},
     pages = {631--636},
     publisher = {mathdoc},
     volume = {29},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1990_29_6_a0/}
}