@article{PORMA_1977__36_1_115304,
     author = {Kleinfeld, Erwin and Kleinfeld, Margaret Humm},
     title = {Rings of type $(\gamma ,\delta )$ without zero divisors are associative},
     journal = {Portugaliae mathematica},
     pages = {65--77},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {1977},
     mrnumber = {0535225},
     zbl = {0407.17002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1977__36_1_115304/}
}