@article{10_4153_CJM_1975_005_9,
     author = {Stevenson, Frederick W.},
     title = {Weakly {Isotopic} {Planar} {Ternary} {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {32--36},
     year = {1975},
     volume = {27},
     number = {1},
     doi = {10.4153/CJM-1975-005-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-005-9/}
}