| 1/2 | US=44 / Clín/Medica Melnick T. Case 19: knee pain. In: Okuda Y, Nelson BP. Emergency medicine oral board review illustrated. New York: Cambridge University Press, 2010. p. 97-101. ISBN 978-0-521-89639-9. |
| 2/2 | US=44 / Clín/Medica Shen B. Case 56: knee pain. In: Okuda Y, Nelson BP. Emergency medicine oral board review illustrated. New York: Cambridge University Press, 2010. p. 240-4. ISBN 978-0-521-89639-9. |