@article{MT_2014_17_1_a1,
     author = {V. P. Burichenko},
     title = {Nonsplit extensions of {Abelian} $p$-groups by $L_2(p^n)$ and general theorems on extensions of finite groups},
     journal = {Matemati\v{c}eskie trudy},
     pages = {19--69},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2014_17_1_a1/}
}