1. Ḫat.t. al-musnad wa-n-nuqūš al-yamanīya al-qadīma. Dirāsa li-kitāba yamanīya qadīma manqūša ʿalā l-ḫašab. Al-Ḥalqa aṯ-ṯāniya;ʿAbdallāh;Al-Yaman al-Ǧadīd,1986
2. Some absolute dates for the development of the South Arabian minuscule script;Drewes;AAE
3. Le iscrizioni su ceramica da ad-Durayb/Yalā;Garbini;Yemen,1992