Crossan, John Dominic (1995). Jesus: A Revolutionary Biography. HarperOne. p. 145. ISBN0-06-061662-8. «That he was crucified is as sure as anything historical can ever be, since both Josephus and Tacitus...agree with the Christian accounts on at least that basic fact.»
Ayalon, A., Bar-Matthews, M., & Goren, Y. (2004). «Authenticity examination of the inscription on the ossuary attributed to James, brother of Jesus». Journal of Archaeological Science31 (8): 1185-1189. doi:10.1016/j.jas.2004.03.001.