William Allen Simpson. The Point-to-Point Protocol (PPP). RFC, 1548:1-53, December 1993. [doi]
@article{rfc1548, title = {The Point-to-Point Protocol (PPP)}, author = {William Allen Simpson}, year = {1993}, month = {December}, doi = {10.17487/RFC1548}, url = {https://doi.org/10.17487/RFC1548}, researchr = {https://researchr.org/publication/rfc1548}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {1548}, pages = {1-53}, }