@article{1256048318, author = {Zarrow, Robert}, title = {Orientation reversing square roots of involutions}, journal = {Illinois J. Math.}, volume = {23}, number = {4}, year = {1979}, pages = { 71-81}, language = {en}, url = {http://dml.mathdoc.fr/item/1256048318} }
Zarrow, Robert. Orientation reversing square roots of involutions. Illinois J. Math., Tome 23 (1979) no. 4, pp. 71-81. http://gdmltest.u-ga.fr/item/1256048318/