[1922] De causis et procreatione universi, I, iv, 7, “Utrum coelum moveatur ab anima vel a natura vel ab intelligentia.”
[1923] De causis et proprietatibus elementorum et planetarum, I, ii, 9.
[1924] De animalibus, XX, ii, 2.
[1925] De intellectu et intelligibili, I, 4. “Mediae autem causae sunt motores orbium coelestium quos intelligentias coelestes vocaverunt Philosophi. ... ideo melius intelligentes Philosophi totum unicum motorem dixerunt habere, et inferiores motores ad sphaeras dixerunt esse virtutes et membra primi coeli et sui motoris.” Yet in De coelo et mundo, II, iii, 5, he asserts again that the stars “sunt instrumenta intellectuum moventium,” as if there were more than one intelligence.
[1926] See De meteoris, I, i, 4 and 7; De causis et propriet. element., etc., I, ii, 2; Mineralium, II, iii, 3; De causis et procreat. universi, II, ii, 23.
[1927] De natura locorum, I, 6.
[1928] Meteor., III, iii, 22.
[1929] De causis et propriet., I, ii, 2.
[1930] Idem.
[1931] Ibid., I, ii, 9.