@article{bwmeta1.element.bwnjournal-article-ccv32i3p671bwm,
author = {Rolewicz, Stefan},
title = {On $\sigma$-porous and $\Phi$-angle-small sets in metric spaces},
journal = {Control and Cybernetics},
volume = {32},
year = {2003},
pages = {671-681},
zbl = {1137.49305},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-ccv32i3p671bwm}
}
Rolewicz, Stefan. On σ-porous and Φ-angle-small sets in metric spaces. Control and Cybernetics, Tome 32 (2003) pp. 671-681. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-ccv32i3p671bwm/