@article{10_4153_CMB_1970_005_3,
     author = {Zaks, Abraham},
     title = {Quasi-Frobenius {X-Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {23--30},
     year = {1970},
     volume = {13},
     number = {1},
     doi = {10.4153/CMB-1970-005-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-005-3/}
}