@article{10_4153_CJM_2002_045_0,
     author = {Cobo, Milton and Gutierrez, Carlos and Llibre, Jaume},
     title = {On the {Injectivity} of {C} 1 {Maps} of the {Real} {Plane}},
     journal = {Canadian journal of mathematics},
     pages = {1187--1201},
     year = {2002},
     volume = {54},
     number = {6},
     doi = {10.4153/CJM-2002-045-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2002-045-0/}
}