Journal:Journal of Quality & Technology Management, 2016, Volume 12, Issue No 1
Author(s): M. Jan, M.S. Khalid, A.A. Awan, S. Nisar
Journal:Journal of Engineering and Applied Sciences (JEAS), 2017, Volume 36, Issue No 2
Author(s): Muhammad Asad Ali, Mirza Jahanzaib, Muhammad Ahsan Ul Haq