Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1.
Porceddu, S.; Jetsu, L.; Lyytinen, J.; Kajatkari, P.; et al. (2008). "Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days". Cambridge Archaeological Journal. 18 (3): 327–339. Bibcode:2008CArcJ..18..327P. doi:10.1017/S0959774308000395.
Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1.
Porceddu, S.; Jetsu, L.; Lyytinen, J.; Kajatkari, P.; et al. (2008). "Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days". Cambridge Archaeological Journal. 18 (3): 327–339. Bibcode:2008CArcJ..18..327P. doi:10.1017/S0959774308000395.
Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1.