[1] Cardani, De subtilitate, lib. 9 De animalibus, fol. 503 et De rerum varietate, lib. 7, cap. 28, fol. 219.

[2] Aristotelis De generatione, lib. i.

[3] Plinii, lib. 7, cap. 12.

[4] Avicennae De animalibus, lib. 9, cap. 1, De moribus animalium.

[5] Aristotelis De natura animalium, lib. 9, cap. 38.

[6] Aristotelis De motu animalium, cap. 6.

[7] Sect. 7.

[8] Cardani De animorum immortalitate, fol. 244.

[9] Caelii Rhodigini, lib. 20, cap. 15.