 One of the sources he quotes most frequently is the "Materia Medica" of Dioscorides who was inspired by Magon, another Amazigh, having also written an Arabic commentary on the work.Another book often cited by him is Book Two of the "Canon of Medicine" of Ibn Sīnā (Aveicenna).Both of those sources have similarities in layout and subject matter with Ibn al-Bayṭār's own book, but Ibn al-Bayṭār's treatments are richer in detail, and a large minority of Ibn al-Bayṭār's useful plants or plant substances are not covered at all by Dioscorides or Ibn Sīnā.