Ali, Syed Ahtsham, Syed Irfan Ali, Xu Qiyu, and Xu Ming. 2016. “Directions to Explore the Principles of Service Innovation: With Various Companies’ Case Study”. Journal of Research in Business, Economics and Management 6 (3), 971-78. http://scitecresearch.com/journals/index.php/jrbem/article/view/822.