Stanski, C.; Luz, C. F. P.; Nogueira, A.; Nogueira, M. K. F. de S. Palynology of Species in the Astereae and Heliantheae Tribes Occurring in the Region of Campos Gerais, Paraná State, Brazil. Iheringia. Sér. Botânica. 2013, 68, 203-214.