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Zambell, C.B.; Adams, J.M.; Gorring, M.L.; Schwartzman, D.W. (2012). "Effect of lichen colonization on chemical weathering of hornblende granite as estimated by aqueous elemental flux". Chemical Geology. 291: 166–174. Bibcode:2012ChGeo.291..166Z. doi:10.1016/j.chemgeo.2011.10.009.