Impact of the herbicide metolachlor on river periphytic diatoms: Experimental comparison of descriptors at different biological organization levelsVincent Roubeix, Nicolas Mazzella, Brigitte Méchin, Michel Coste and François DelmasAnn. Limnol. - Int. J. Lim., 47 3 (2011) 239-249DOI: https://doi.org/10.1051/limn/2011009