A number of publications discussing Abjad are available for download here:
Bača, Trevor, Josiah Wolf Oberholtzer, Jeffrey Treviño and Víctor Adán. “Abjad: An Open-Software System For Formalized Score Control.” Proceedings of the First International Conference on Technologies for Music Notation and Representation. 2015.
Davancens, Joseph. “Heave, Sway, Surge.” Doctoral dissertation, University of California, Santa Cruz. 2019.
Evans, Gregory Rowland. “An introduction to modeling composition through Abjad’s model of music notation.” Master’s thesis, University of Miami. 2019.
Oberholtzer, Josiah Wolf. A Computational Model of Music Composition. Doctoral dissertation, Harvard University, Graduate School of Arts & Sciences. 2015.
Treviño, Jeffrey Robert. Compositional and analytic applications of automated music notation via object-oriented programming. Doctoral dissertation, University of California, San Diego. 2013.