Babu, P. S., and D. G. Sreenivasulu. “Mesosphere Stratosphere Troposphere (MST) Radar Signal Using Discrete Wavelet Transform With Overlapping Group Shrinkage”. International Journal of Advanced Science and Technology, Vol. 28, no. 9, Oct. 2019, pp. 133 -6, http://sersc.org/journals/index.php/IJAST/article/view/780.