Morphological examination and biogeography of the Gomphonema rosenstockianum and G. tergestinum species complex (Bacillariophyceae) - Novais, Maria Helena; Blanco, Saúl; Hlúbiková, Da?a; Falasco, Elisa; Gomá, Joan; Delgado, Cristina; Ivanov, Plamen; Ács, Éva; Morais, Manuela; Hoffmann, Lucien; Ector, Luc (2009)