@article{AL_1990_29_5_a1,
     author = {V. A. Vedernikov},
     title = {Subdirect products and formations of finite groups},
     journal = {Algebra i logika},
     pages = {523--548},
     publisher = {mathdoc},
     volume = {29},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1990_29_5_a1/}
}