Pieri, L., Ventura, F., Ventura, M., Tagliavini, M., Ponti, M., Pistocchi, R., Albertazzi, S., Vignudelli, M., & Rossi Pisa, P. (2011). Chemical and biological indicators of water quality in three agricultural watersheds of the Po valley, Italy. Italian Journal of Agronomy, 6(4), e36. https://doi.org/10.4081/ija.2011.e36