Nguyen Xuan Thao, and Florentin Smarandache. 2016. “(ð“˜, ð“£) âˆ’Standard Neutrosophic Rough Set and Its Topologies Properties”. Neutrosophic Sets and Systems 14 (December): 65-70. https://fs.unm.edu/nss8/index.php/111/article/view/580.