@article{05019506, title = {On a theorem of \v Sapirovski\u\i\ on the size of a sequential space.}, journal = {Mathematica Pannonica}, volume = {16}, year = {2005}, pages = {173-177}, zbl = {1100.54002}, language = {en}, url = {http://dml.mathdoc.fr/item/05019506} }
Bella, Angelo. On a theorem of Šapirovskiĭ on the size of a sequential space.. Mathematica Pannonica, Tome 16 (2005) pp. 173-177. http://gdmltest.u-ga.fr/item/05019506/