Pramanik, S., Partha Pratim Dey, and B. C. Giri. “TOPSIS for Single Valued Neutrosophic Soft Expert Set Based Multi-Attribute Decision Making Problems”. Neutrosophic Sets and Systems, vol. 10, Dec. 2015, pp. 88-95, https://fs.unm.edu/NSS2/index.php/111/article/view/467.