Keilani, M.; Krall, C.; Lipowec, L.; Posch, M.; Komanadj, TS.; Crevenna, R. Skateboarding injuries in Vienna: location, frequency, and severity.. PM R. Jul 2010, 2 (7): 619–24. PMID 20659717. doi:10.1016/j.pmrj.2010.04.022.
Keilani, M.; Krall, C.; Lipowec, L.; Posch, M.; Komanadj, TS.; Crevenna, R. Skateboarding injuries in Vienna: location, frequency, and severity.. PM R. Jul 2010, 2 (7): 619–24. PMID 20659717. doi:10.1016/j.pmrj.2010.04.022.