@article{MZM_1971_10_6_a10,
     author = {T. S. Tol'skaya},
     title = {Co-imaging rings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {689--700},
     publisher = {mathdoc},
     volume = {10},
     number = {6},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_6_a10/}
}