@article{AL_2017_56_6_a0,
     author = {P. E. Alaev},
     title = {Structures computable in polynomial {time.~II}},
     journal = {Algebra i logika},
     pages = {651--670},
     publisher = {mathdoc},
     volume = {56},
     number = {6},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2017_56_6_a0/}
}