1. Rhynchota (Heteroptera) from British India;Distant;Ann. de La Sociètè Entomol. de Belg.,1909
2. Isidore of Seville, Historia de regibus Gothorum, Vandalorum et Suevorum, chapter 54,1970
3. Christians in Al-Andalus, 711-1000;Christys,2002
4. John of Biclaro, Chronicle, 91,1990
5. Rhynchota–Vol. V. Heteroptera: Appendix;Distant,1910