1. Solomon L, Warwick D, Nayagam D. Apley’s concise system of orthopaedics and fractures. 3rd ed. London: Hodder & Arnold; 2005. p. 687.
2. Andreasen FM, Andreasen JO. Crown fractures. In: Andreasen JO, Andreasen FM, Andersson L, editors. Textbook and color atlas of traumatic injuries to the teeth. 4th ed. Oxford: Blackwell; 2007. p. 280–313.
3. Colleague for Excellence. Cracking the crack tooth code. Detection and treatment of various longitudinal tooth fractures. Chicago: American Association of Endodontists; 2008.
4. Andreasen JO. Traumatic injuries of the teeth. 2nd ed. Copenhagen: Denmark Munksgaard; 1981.
5. Rivera EM, Walton RE. Longitudinal tooth fractures: findings that contribute to complex endodontic diagnosis. Endod Top. 2009;16:82–111.