The other two are
A HISTORY OF THE ARABIAN HORSE AND ITS INFLUENCE ON MODERN BREEDS
F. KNORB (serch on libgen)
Insight on the Ancient Arabian Horse from North Arabian Petroglyphs
Sandra L. Olsen (Google search would probably be sufficient)
the latter one , the women gives a pretty forthcoming explanation of how it possible can have North African orgins
the F. Knorb paper makes snide remarks about the prophet SAW I don’t like but he does mention how horses similar to the Arabian were present in the Egyptian new kingdom