Lopes, C V., and A. Chadha,  
"A 40bps Speech Coding Scheme",  
Symposium on Signal Processing for Communications, San Francisco, CA, IEEE Globecom, December, 2003.
 Lopes, C V., and A. Chadha,  
"A 40bps Speech Coding Scheme",  
Symposium on Signal Processing for Communications, San Francisco, CA, IEEE Globecom, December, 2003.