TY - JOUR A1 - Bugalho, M. N. A1 - Barcia, P. A1 - Caldeira, M. C. A1 - Cerdeira, J. O. T1 - Stable isotopes as ecological tracers: an efficient method for assessing the contribution of multiple sources to mixtures JO - Biogeosciences Discuss. J1 - BGD VL - 5 IS - 3 SP - 2425 EP - 2444 Y1 - 2008/06/09 PB - Copernicus Publications SN - 1810-6277 UR - http://www.biogeosciences-discuss.net/5/2425/2008/ L1 - http://www.biogeosciences-discuss.net/5/2425/2008/bgd-5-2425-2008.pdf ER -