Posadas, A. N. D.; Giménez, D.; Bittelli, M.; Vaz, C. M. P.; Flury, M. (2001). "Multifractal Characterization of Soil Particle-Size Distributions". Soil Science Society of America Journal. 65 (5): 1361. Bibcode:2001SSASJ..65.1361P. doi:10.2136/sssaj2001.6551361x.
Posadas, A. N. D.; Giménez, D.; Bittelli, M.; Vaz, C. M. P.; Flury, M. (2001). "Multifractal Characterization of Soil Particle-Size Distributions". Soil Science Society of America Journal. 65 (5): 1361. Bibcode:2001SSASJ..65.1361P. doi:10.2136/sssaj2001.6551361x.