Muškilat al-hamza al-ʿarabīya baḥṯ fī tārīẖ al-ẖaṭṭ al-ʿarabī wa-taisīr al-imlā' wa-'t-taṭauwur al-luġawī lil-ʿarabīya al-fuṣḥā - ʿAbd-at-Tauwāb, Ramaḍān 1930- (al-Hānǧī, 1996)