A treatise on the veneration of the holy icons written in Arabic by Theodore Abu Qurrah, bishop of Harran (C. 755-C. 830 A.D.) - Abū Qurrah, Ṯāwdūrūs, <750?-820?>. (OLS)http://semarc/name/30086; Griffith, Sidney Harrison. (OLS)http://semarc/name/89104 (Peeters, 1997)
Keywords: Icone. (OLS)http://semarc/subject/1633

Les langues de l'Italie médiévale : textes d'histoire et de littérature 10.-14. siecle - Redon, Odile. (OLS)http://semarc/name/46411 (Brepols, 2002)
Keywords: Lingua latina medievale. (OLS)http://semarc/subject/33225; Lingue italiane volgari. (OLS)http://semarc/subject/60284; Lingua italiana - Storia - Sec. 10.-14 - Studi. (OLS)http://semarc/subject/19720