Anatoxin-a occurrence and potential cyanobacterial anatoxin-a producers in spanish reservoirs - Quesada del Corral, Antonio; Carrasco, David; Moreno, Enrique; Paniagua, Thamar; de Hoyos, Caridad; Wormer, Lars; Sanchis, Daniel; Cires, Samuel; Martin-Del-Pozo, Delia; Codd, Geoffrey A; Quesada, Antonio (Journal Of Phycology, 2007)