@article{demori1972digital, title = {Digital Speech Data Transmission Using Pitch Synchronous Analysis and Extremal Coding}, author = {De Mori, Renati and Serra, Angelo}, journal = {J. Audio Eng. Soc}, volume = {20}, number = {7}, pages = {562--567}, year = {1972}, url = {https://www.aes.org/e-lib/browse.cfm?elib=2047} }