@article{MZ_1970__117_171400,
     author = {Paul M. Cohn},
     title = {On a {Class} with {Rings} with {Inverse} {Weak} {Algorithm.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--6},
     publisher = {mathdoc},
     volume = {117},
     year = {1970},
     zbl = {0212.37404},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__117_171400/}
}