@article{PFMT_2013_3_a13,
     author = {V. I. Murashka},
     title = {On one generalization of {Baer's} theorems about hypercenter and nilpotent residual},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {84--88},
     publisher = {mathdoc},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2013_3_a13/}
}