The following has been added to the Zotero Group for Ancient World Open Bibliographies and the Ancient World Open Bibliographies Wiki.
Classical Grammar and Information Architecture
Bibliography on Latin Stemmatic Diagrams Since Late Antiquity
http://www.piggin.net/stemmahist/biblio.htm
Jean-Baptiste Piggin
Last updated May 2010, continuing.
Lists debate about and editions containing Late Antique Latin stemmatic diagrams, many with links to digital versions. Part of the Macro-Typography website, which contains a series of articles on information architecture and text arrangement, both contemporary and historical. Annotation of the bibliography is is in progress, and it has an introduction.
Ancient World Open Bibliographies 