Zakaria, A.:
Measuring Soft Roughness of Soft Rough Sets Induced by Covering.
In: Thriving Rough Sets. Ed.: Guoyin Wang, Andrzej Skowron, Yiyu Yao, Dominik Dominik Ślęzak, Lech Polkowski, Springer International Publishing Ag, Cham, 269-281, 2017, (Studies in Computational Intelligence, ISSN 1860-949X) ISBN: 9783319855332