Polushin, P. A. “Suppression of the External Interferences and Spectral Distortion by Means of Simultaneous Separation of Signal and Interferences Part 2. Suppression of a Single Interference and a Complex of Interferences”. Indian Science Cruiser, vol. 18, no. 4, Dec. 2004, pp. 32-35, http://informaticsjournals.com/index.php/ISC/article/view/42277.