Hsieh, Ming-ta; Sobelman, Gerald «Architectures for Multi-Gigabit Wire-Linked Clock and Data Recovery». IEEE Circuits and Systems Magazine. Institute of Electrical and Electronics Engineers, 8, 4, 12-2008, pàg. 45–57. DOI: 10.1109/MCAS.2008.930152.
Costas, J.P. «Synchronous communications». Proceedings of the IRE. IEEE, 44, 1956, pàg. 1713–1718. DOI: 10.1109/JRPROC.1956.275063.