Ali, Mumtaz, Florentin Smarandache, Muhammad Shabir, and Munazza Naz. 2020. “Soft Neutrosophic Bigroup and Soft Neutrosophic N-Group”. Neutrosophic Sets and Systems 2 (September):55-81. http://fs.unm.edu/NSS2/index.php/111/article/view/259.