@article{1029000209, author = {Tollefson, Jeffrey L.}, title = {On $3$-manifolds that cover themselves.}, journal = {Michigan Math. J.}, volume = {16}, number = {1}, year = {1969}, pages = { 103-109}, language = {en}, url = {http://dml.mathdoc.fr/item/1029000209} }
Tollefson, Jeffrey L. On $3$-manifolds that cover themselves.. Michigan Math. J., Tome 16 (1969) no. 1, pp. 103-109. http://gdmltest.u-ga.fr/item/1029000209/