@article{MOMA_1971__75_177562,
     author = {L.A. Machtinger},
     title = {Rings {Satisfying} a {Not-Necessarily} {Transitive} {Relation.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {320--323},
     publisher = {mathdoc},
     volume = {75},
     year = {1971},
     zbl = {0248.06013},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1971__75_177562/}
}