JAWHAR A, and RAJYA LAKSHMI C. “INVESTIGATION OF NON-LINEAR MARITIME SIGNAL ESTIMATION SCHEME FOR PASSIVE ACOUSTIC AND ELECTROMAGNETIC UNDERWATER TRACKING AND UNDERWATER SURVEILLANCE”. Innovare Journal of Engineering and Technology, vol. 5, no. 1, Jan. 2017, pp. 51-57, https://journals.innovareacademics.in/index.php/ijet/article/view/15877.