A. Poritz. Proceedings of the 1982 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 7, page 1291-1294. Paris, France, (May 1982)
D. Rajput. International Journal of Chemistry; Vol. 8, No. 1; 2016 ISSN 1916-9698 E-ISSN 1916-9701 Published by Canadian Center of Science and Education, 8 (1):
32-39(2016)