@article{SM_1996_187_9_a4,
     author = {V. N. Tyutyanov},
     title = {Products of $\pi$-nilpotent subgroups},
     journal = {Sbornik. Mathematics},
     pages = {1349--1354},
     publisher = {mathdoc},
     volume = {187},
     number = {9},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1996_187_9_a4/}
}