Galande, M. S. G., D. G. Agrawal, and M. S. Dighe. “Greenhouse Microclimatic Real-Time Monitoring With the Help of NPK Sensor”. International Journal of Emerging Trends in Science and Technology, Vol. 2, no. 05, May 2015, http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/709.