@article{MZ_1960__73_169862,
     author = {Paul M. Cohn},
     title = {On the {Free} {Product} of {Associative} {Rings.} {II.} {The} {Case} of {(Skew)} {Fields.}},
     journal = {Mathematische Zeitschrift},
     pages = {433--456},
     publisher = {mathdoc},
     volume = {73},
     year = {1960},
     zbl = {0095.25701},
     url = {http://geodesic.mathdoc.fr/item/MZ_1960__73_169862/}
}