Georgius Cedrenus − CSHB9: 344: "Anno mundi 6471 mortuus est Romanus imperator, 15 die Martii mensis. indictione 6, annos natus 24. imperavit annos 3, menses 4, dies 5." [10 November 959 − 15 March 963]
McMahon 2021, p. 67-69. McMahon, Lucas (2021). "Logistical modelling of a sea-borne expedition in the Mediterranean: the case of the Byzantine invasion of Crete in AD 960". Mediterranean Historical Review. 36 (1): 63–94. doi:10.1080/09518967.2021.1900171.