TY - JOUR AU - O. A. Shpyrko TI - The derived $\pi$-length, nilpotent $\pi$-length, and simple $\pi$-length of finite $\pi$-soluble groups JO - Fundamentalʹnaâ i prikladnaâ matematika PY - 2012 SP - 225 EP - 235 VL - 17 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FPM_2012_17_5_a14/ LA - ru ID - FPM_2012_17_5_a14 ER -