Conrad 1987. Conrad, Lawrence I. (1987). "Abraha and Muhammad: some observations apropos of chronology and literary topoi in the early Arabic historical tradition1". Bulletin of the School of Oriental and African Studies. 50 (2): 225–40. doi:10.1017/S0041977X00049016. S2CID162350288.
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Conrad 1987. Conrad, Lawrence I. (1987). "Abraha and Muhammad: some observations apropos of chronology and literary topoi in the early Arabic historical tradition1". Bulletin of the School of Oriental and African Studies. 50 (2): 225–40. doi:10.1017/S0041977X00049016. S2CID162350288.