Sabine Schmidtke,”Preserving, Studying, and Democratizing Access to the World Heritage of Islamic Manuscripts: The Zaydī Tradition,” Chroniques du manuscrit au Yémen 23 [nouvelle série 4] (2017), pp. 103-166.
The complete issue can be accessed (open access) via <http://www.cdmy.org/cmy/cmy23.pdf>