@article{10_4153_CJM_1968_006_7,
     author = {Gard, J. R. and Johnson, R. D.},
     title = {Four-Dimension {Equivalences}},
     journal = {Canadian journal of mathematics},
     pages = {48--50},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-006-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-006-7/}
}