Knight, Peter G. (2009). «Cirques». Encyclopedia of Earth Sciences Series: Encyclopedia of Paleoclimatology and Ancient Environments. Cirques 1358. Springer Netherlands: . pp. 155-56. ISBN978-1-4020-4551-6. doi:10.1007/978-1-4020-4411-3_37.
Johnny W. Sanders; Kurt M. Cuffey; Jeffrey R. Moore; Kelly R. MacGregor; Jeffrey L. Kavanaugh (2012). «Periglacial weathering and headwall erosion in cirque glacier bergschrunds». Geology40 (9): 779-782. Bibcode:2012Geo....40..779S. S2CID128580365. doi:10.1130/G33330.1.
Johnny W. Sanders; Kurt M. Cuffey; Jeffrey R. Moore; Kelly R. MacGregor; Jeffrey L. Kavanaugh (2012). «Periglacial weathering and headwall erosion in cirque glacier bergschrunds». Geology40 (9): 779-782. Bibcode:2012Geo....40..779S. S2CID128580365. doi:10.1130/G33330.1.
Johnny W. Sanders; Kurt M. Cuffey; Jeffrey R. Moore; Kelly R. MacGregor; Jeffrey L. Kavanaugh (2012). «Periglacial weathering and headwall erosion in cirque glacier bergschrunds». Geology40 (9): 779-782. Bibcode:2012Geo....40..779S. S2CID128580365. doi:10.1130/G33330.1.