Sudipta Gayen, Florentin Smarandache, Sripati Jha, and Ranjan Kumar. “Introduction to Interval-Valued Neutrosophic Subring”. Neutrosophic Sets and Systems 36 (October 7, 2020): 220–245. Accessed August 15, 2024. https://fs.unm.edu/nss8/index.php/111/article/view/784.