Lenzen, Christoph Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Lenzen, C., Sommer, P., & Wattenhofer, R. (2015). PulseSync: An Efficient and Scalable Clock Synchronization Protocol. IEEE/ACM Transactions on Networking, 23(3), 717-727. doi:10.1109/TNET.2014.2309805.