@article{AL_2009_48_4_a4,
     author = {A. R. Chekhlov},
     title = {Abelian groups with normal endomorphism rings},
     journal = {Algebra i logika},
     pages = {520--539},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2009_48_4_a4/}
}