RADHIKA BASKAR, SUDHAKAR SENGAN, S.SUMITHRA, R.PURUSHOTHAMAN, T. JAYASANKAR. An Improved Routing Schema with Special Clustering using Hybrid GA-ACO-PSO for Heterogeneous Wireless Sensor Network. International Journal of Advanced Science and Technology, v. 29, n. 05, p. 6661 - 6672, 23 May 2020.