Muhammad Ghoniem, M S M Saifullah, cAbd ar-Rahmân Robert Squires & cAbdus Samad, Are There Scribal Errors In The Qur'ân?, see qif on a traffic sign written ڧڢ which is written elsewhere as قف, Retrieved 2011-August-27
islamicmanuscripts.info
van den Boogert, N. (1989). «Some notes on Maghrebi script». Manuscript of the Middle East4. p. 38 shows qāf with a superscript point in all four positions.