Soreide, K; Ellingsen, CL; Knutson, V (May 2007). "How dangerous is BASE jumping? An analysis of adverse events in 20,850 jumps from the Kjerag Massif, Norway". The Journal of Trauma. 62 (5): 1113–7. doi:10.1097/01.ta.0000239815.73858.88. PMID17495709.
Soreide, K; Ellingsen, CL; Knutson, V (May 2007). "How dangerous is BASE jumping? An analysis of adverse events in 20,850 jumps from the Kjerag Massif, Norway". The Journal of Trauma. 62 (5): 1113–7. doi:10.1097/01.ta.0000239815.73858.88. PMID17495709.