@ARTICLE{BouSigAbs+2013, author = "Nicolas Boumal and Amit Signer and P.-A. Absil and Vincent D. Blondel", title = "Cramer-Rao bounds for synchronization of rotations", fjournal = "Information and Inference", journal = "Information and Inference", volume = 3, number = 1, year = 2014, doi = "10.1093/imaiai/iat006", }