Jaymit Pandya, Dhara Monaka, and Jay Vala. “Proposed Work on Door Status Identification Using Image Processing Aproaches”. International Journal of Advance Engineering and Research Development (IJAERD), vol. 1, no. 2, Feb. 2014, pp. 42-45, https://www.ijaerd.org/index.php/IJAERD/article/view/5323.