@article{AL_2009_48_1_a0,
     author = {F. A. Dudkin},
     title = {Subgroups of {Baumslag--Solitar} groups},
     journal = {Algebra i logika},
     pages = {3--30},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2009_48_1_a0/}
}