TY  - JOUR
AU  - Spoar, G.
AU  - Lane, N. D.
TI  - On Singular Points of Normal Arcs of Cyclic Order Four
JO  - Canadian mathematical bulletin
PY  - 1974
SP  - 391
EP  - 396
VL  - 17
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-072-2/
DO  - 10.4153/CMB-1974-072-2
ID  - 10_4153_CMB_1974_072_2
ER  -