@article{FPM_2008_14_7_a14,
     author = {O. Macedo\'nska},
     title = {What do the {Engel} laws and positive laws have in common?},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {175--183},
     publisher = {mathdoc},
     volume = {14},
     number = {7},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2008_14_7_a14/}
}