1. 1. Castellucci A. Endodontics, vol. 1. Il Tridente, Firenze, 2007; p.244-252.
2. 2. Iliescu A. Tratat de Endodontie, vol. 2, Ed. Medicala 2014, 593-594.
3. 3. Ingle JI, Bakland LK, Baumgartner JC. Endodontics. 6th ed. BC Decker Inc, Hamilton, Ontario;2008; p.1122-1123.
4. 4. Lumley P, Adams N, Tomson P. Practical Clinical Endodontics. Churchill Livingstone Elsevier Edinburgh; 2006; p.35-37.
5. 5. Torabinejad M, Lemon RR. Procedural Accidents. In: Torabinejad M, Walton RE, editors. Endodontics: Principles and Practice. 4th ed. Sauders Co. St. Louis; 2009; p.328-330.