@article{Meisters1990, author = {Meisters, Gary H. and Olech, Czesław}, doi = {10.4064/ap-51-1-249-254}, journal = {Annales Polonici Mathematici}, month = {jan}, pages = {249-254}, title = {A Jacobian condition for injectivity of differentiable plane maps}, url = {https://www.impan.pl/shop/publication/transaction/download/product/106843?download.pdf}, volume = {51}, year = {1990} }