@article{article575214db,
title   = {Global injectivity of 'C POT. 1' maps of the real plane, inseparable leaves and the Palais–Smale condition},
author = {Vidalon, Carlos Teobaldo Gutiérrez and Jarque, Xavier and Llibre, Jaume and Teixeira, Marco Antonio},
year = {2007},
doi = {10.4153/CMB-2007-036-0},
journal   = {Canadian Mathematical Bulletin}
}