But it was his commentary on Aristotle 's Physics that was especially widely read. Many manuscripts of it can be found in France and Italy, in Erfurt and Prague. Albert's Physics basically guaranteed the transmission of the Parisian tradition to Italy, where it was authoritative along with the works of Heytesbury and John Dumbleton. His commentary on Aristotle's De caelo was also influential, eventually eclipsing Buridan's commentary on this text. Blasius of Parma read it in Bologna between 1379 and 1382. A little later, it enjoyed a wide audience at Vienna. His Treatise on Proportions was often quoted in Italy where, in addition to the texts of Thomas Bradwardine and Oresme, it influenced the application of the theory of proportions to motion.