C. Y. Pak, F. Britton, R. Peterson, D. Ward, C. Northcutt, N. A. Breslau, J. McGuire, K. Sakhaee, S. Bush, M. Nicar, D. A. Norman, P. Peters: Ambulatory evaluation of nephrolithiasis. Classification, clinical presentation and diagnostic criteria. In: The American journal of medicine. Band 69, Nummer 1, Juli 1980, S. 19–30, doi:10.1016/0002-9343(80)90495-7, PMID 6247914.
C. Y. Pak, F. Britton, R. Peterson, D. Ward, C. Northcutt, N. A. Breslau, J. McGuire, K. Sakhaee, S. Bush, M. Nicar, D. A. Norman, P. Peters: Ambulatory evaluation of nephrolithiasis. Classification, clinical presentation and diagnostic criteria. In: The American journal of medicine. Band 69, Nummer 1, Juli 1980, S. 19–30, doi:10.1016/0002-9343(80)90495-7, PMID 6247914.