1. 1. Galen. Medicorum Graecorum Opera, III, Lipsiae prostat in officina libraria car. Cuoblochii 1824, de locis affectis. Kuhn DC (ed.). Tome VIII, Lib V, Chap. 2, 304. In: Beck CS. Wounds of the heart. The technic of suture.Arch. Surg.1926;13: 20527.
2. 2. Homer.The Illiad, Vol. XIII. New York: Macmillan Co, 1922; line 442, p.259.
3. 3. Hippocrates.The Genuine Works of Hippocrates, 2. New York: William Wood, 1886; Sec. 6, Aphorism 18, p. 252.
4. 4. L. Rehn Ueber penetrerende herzwunden und herznaht. Arch. Kin. Chir. 1897: 55: 315. In: Beck CS. Wounds of the heart. The technic of suture.Arch. Surg. 1926;13: 20527.
5. Beiträge zur pathologischen Anatomie der Contusio und Commotio cordis