TY  - JOUR
AU  - Gard, J. R.
AU  - Johnson, R. D.
TI  - Four-Dimension Equivalences
JO  - Canadian journal of mathematics
PY  - 1968
SP  - 48
EP  - 50
VL  - 20
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-006-7/
DO  - 10.4153/CJM-1968-006-7
ID  - 10_4153_CJM_1968_006_7
ER  -