1. Agapius, 1912 Kitāb al-‘unwān (o Histoire Universelle), Partie II, in Patrologia Orientalis, Tomus Octavus, A.A. Vasiliev, R. Graffin, F. Nau eds., (Paris).
2. Meteoroid ejection velocities deduced from a study of the April Lyrid meteor shower;Arter;Mon. Not. R. Astron. Soc.,2002
3. De Scriptoribus Syris Monophysitis, Tomus II in Bibliotheca Orientalis Clementino-Vaticana;Assemani,1721
4. Chronica, Monumenta Germaniae Historica, Auctores Antiquissimi;Aventicensis,1894
5. The Etymologies of Isidore of Seville;Barney,2006