Madad Khan, Muhammad Zeeshan, Saima Anis, and Florentin Smrandache. “Pythagorean Neutrosophic Triplet Groups”. Neutrosophic Sets and Systems 67 (May 1, 2024): 261–276. Accessed April 19, 2025. https://fs.unm.edu/nss8/index.php/111/article/view/4464.