@article{GDZPPN002433915, title = {Immersed Spheres in ....2 and S2 x S2.}, journal = {Mathematische Zeitschrift}, volume = {194}, year = {1987}, pages = {51-58}, url = {http://dml.mathdoc.fr/item/GDZPPN002433915} }
Suciu, Alexander I. Immersed Spheres in ....2 and S2 x S2.. Mathematische Zeitschrift, Tome 194 (1987) pp. 51-58. http://gdmltest.u-ga.fr/item/GDZPPN002433915/