@article{AL_1988_27_3_a5,
     author = {S. V. Rychkov},
     title = {Endomorphism rings of abelian groups},
     journal = {Algebra i logika},
     pages = {327--342},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1988_27_3_a5/}
}