@article{MZM_1971_9_6_a9,
     author = {O. A. Ivanova},
     title = {Linearly ordered rings which are not $o$-epimorphic images of ordered free rings},
     journal = {Matemati\v{c}eskie zametki},
     pages = {693--697},
     publisher = {mathdoc},
     volume = {9},
     number = {6},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_9_6_a9/}
}