@article{paperid:1041211,
author = {Lubica  Hola and Kamel Mirmostafaee, Seyyed Alireza and Z.  Piotrowski},
title = {Points of openness  and closedness of some  mappings},
journal = {Banach Journal of Mathematical Analysis},
year = {2015},
volume = {9},
number = {1},
month = {January},
issn = {1735-8787},
pages = {243--252},
			numpages = {9},
keywords = {pen functions; closed functions; spaces with a base of countable order; topological games.},
}