GACIA, E., E. CHAPPUIS, A. LUMBRERAS, J. L. RIERA, and E. BALLESTEROS. “Functional Diversity of Macrophyte Communities Within and Between Pyrenean Lakes”. Journal of Limnology, vol. 68, no. 1, Feb. 2009, pp. 25-36, doi:10.4081/jlimnol.2009.25.