Kenneth J. Hsü, Catastrophic Debris Streams (Sturzstroms) Generated by Rockfalls, in Geological Society of America Bulletin, vol. 86, n. 1, 1975, pp. 129–140, Bibcode:1975GSAB...86..129H, DOI:10.1130/0016-7606(1975)86<129:CDSSGB>2.0.CO;2. URL consultato il 24 settembre 2017.
«Sturzstroms can move along a flat course for unexpectedly large distances and may surge upward by the power of their momentum.»