TY  - JOUR
AU  - Dunwoody, M. J.
AU  - Pietrowski, A.
TI  - Presentations of the Trefoil Group
JO  - Canadian mathematical bulletin
PY  - 1973
SP  - 517
EP  - 520
VL  - 16
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-084-8/
DO  - 10.4153/CMB-1973-084-8
ID  - 10_4153_CMB_1973_084_8
ER  -