Estimate zebra mussel veliger density from the riverbanks, lotic stretch and reservoir, in two Mediterranean rivers (E Spain)Javier Morales, Miguel Lizana, Fabio Flechoso, Gina M. Bejarano and Ana I. NegroKnowl. Manag. Aquat. Ecosyst., 420 (2019) 7DOI: https://doi.org/10.1051/kmae/2018042