Kaur, Avneet, and Neeraj Sharma. “IESDAD :Improved Energy Efficient Structure- Free Data Aggregation and Delivery Protocol in WSN”. International Journal of Engineering & Technology, vol. 7, no. 2.27, Aug. 2018, pp. 132-7, https://doi.org/10.14419/ijet.v7i2.27.13560.