Reduction of sampling effort assessing macroinvertebrate assemblages for biomonitoring of riversB. Gartzia De Bikuña, E. López, J.M. Leonardo, J. Arrate, A. Martínez, A. Agirre and A. ManzanosKnowl. Managt. Aquatic Ecosyst., 416 (2015) 08DOI: https://doi.org/10.1051/kmae/2015004