Ruediger Kreuter. RTP Payload Format for a 64 kbit/s Transparent Call. RFC, 4040:1-8, April 2005. [doi]
@article{rfc4040, title = {RTP Payload Format for a 64 kbit/s Transparent Call}, author = {Ruediger Kreuter}, year = {2005}, month = {April}, doi = {10.17487/RFC4040}, url = {https://doi.org/10.17487/RFC4040}, researchr = {https://researchr.org/publication/rfc4040}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {4040}, pages = {1-8}, }