@article{AL_2000_39_2_a2,
     author = {A. S. Morozov},
     title = {Once again on the {Higman} question},
     journal = {Algebra i logika},
     pages = {134--144},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2000_39_2_a2/}
}