@article{05174702, title = {The push-out space of immersed spheres.}, journal = {Sibirskij Matematicheskij Zhurnal}, volume = {47}, year = {2006}, pages = {548-556}, zbl = {1115.53043}, language = {en}, url = {http://dml.mathdoc.fr/item/05174702} }
Kaya, Yusuf. The push-out space of immersed spheres.. Sibirskij Matematicheskij Zhurnal, Tome 47 (2006) pp. 548-556. http://gdmltest.u-ga.fr/item/05174702/