@article{FPM_2016_21_2_a0,
     author = {V. A. Artamonov and A. V. Klimakov and A. A. Mikhalev and A. V. Mikhalev},
     title = {Primitive and almost primitive elements of {Schreier} varieties},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {3--35},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2016_21_2_a0/}
}