@article{01899902, title = {On a cancellation law for monounary algebras.}, journal = {Mathematica Bohemica}, volume = {128}, year = {2003}, pages = {79-83}, zbl = {1014.08006}, language = {en}, url = {http://dml.mathdoc.fr/item/01899902} }
Jakubíková-Studenovská, Danica. On a cancellation law for monounary algebras.. Mathematica Bohemica, Tome 128 (2003) pp. 79-83. http://gdmltest.u-ga.fr/item/01899902/