@article{Caldas_Ekici_Jafari_2006, title={On λ-closure spaces}, volume={20}, url={https://revistas.pucp.edu.pe/index.php/promathematica/article/view/10242}, number={39-40}, journal={Pro Mathematica}, author={Caldas, Miguel and Ekici, Erdal and Jafari, Saeid}, year={2006}, month={sep.}, pages={119-133} }