M. Fallah Jelodar, M. Sanei, and S. Mamizadeh Chatghayeh, “COST MALMQUIST PRODUCTIVITY INDEX IN SUPPLY CHAIN”, Int. J. Math. Model. Comput., vol. 2, no. 4, pp. 321–326, Sep. 2016, Accessed: May 10, 2026. [Online]. Available: http://oiccpress.com/ijm2c/article/view/11169