Pawitra Kathait, D. B. ,Jyotsna, M. M. “Comparision of Two Different Andriod Versions i.E Lollipop and Marshmallow, and Also Development of Campsys Mobile Andriod Application - An Overview”. International Journal of Engineering and Computer Science, vol. 5, no. 5, Dec. 2017, http://ijecs.in/index.php/ijecs/article/view/1188.