@article{1077376073, author = {Ziemer, William P.}, title = {The structure of quasi-open maps}, journal = {Duke Math. J.}, volume = {32}, number = {1}, year = {1965}, pages = { 661-671}, language = {en}, url = {http://dml.mathdoc.fr/item/1077376073} }
Ziemer, William P. The structure of quasi-open maps. Duke Math. J., Tome 32 (1965) no. 1, pp. 661-671. http://gdmltest.u-ga.fr/item/1077376073/