TY - JOUR AU - Martin, John R. TI - On Prime Immersions of S 1 into R 2 JO - Canadian journal of mathematics PY - 1976 SP - 589 EP - 593 VL - 28 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-057-5/ DO - 10.4153/CJM-1976-057-5 ID - 10_4153_CJM_1976_057_5 ER -