@article{GDZPPN002390027, title = {The uniqueness of finite division for recursive equivalence types.}, journal = {Mathematische Zeitschrift}, volume = {76}, year = {1961}, pages = {3-7}, zbl = {0093.01203}, url = {http://dml.mathdoc.fr/item/GDZPPN002390027} }
Friedberg, Richard. The uniqueness of finite division for recursive equivalence types.. Mathematische Zeitschrift, Tome 76 (1961) pp. 3-7. http://gdmltest.u-ga.fr/item/GDZPPN002390027/