The highly invasive Chinese mitten crab Eriocheir sinensis in the Tagus Estuary, Portugal: morphology of the specimens 20 years after the first capturesDagmara Wójcik, Anna Wojtczak, Pedro Anastácio and Monika NormantAnn. Limnol. - Int. J. Lim., 50 3 (2014) 249-251DOI: https://doi.org/10.1051/limn/2014019