@article{10_4153_CJM_1976_057_5,
     author = {Martin, John R.},
     title = {On {Prime} {Immersions} of {S} 1 into {R} 2},
     journal = {Canadian journal of mathematics},
     pages = {589--593},
     year = {1976},
     volume = {28},
     number = {3},
     doi = {10.4153/CJM-1976-057-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-057-5/}
}