TY - JOUR AU - O. Macedońska TI - What do the Engel laws and positive laws have in common? JO - Fundamentalʹnaâ i prikladnaâ matematika PY - 2008 SP - 175 EP - 183 VL - 14 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FPM_2008_14_7_a14/ LA - ru ID - FPM_2008_14_7_a14 ER -