@article{1077378966, author = {Ferguson, Le Baron O.}, title = {Algebraic kernels of planar sets}, journal = {Duke Math. J.}, volume = {37}, number = {1}, year = {1970}, pages = { 225-230}, language = {en}, url = {http://dml.mathdoc.fr/item/1077378966} }
Ferguson, Le Baron O. Algebraic kernels of planar sets. Duke Math. J., Tome 37 (1970) no. 1, pp. 225-230. http://gdmltest.u-ga.fr/item/1077378966/