SCHILLING, E. E., F. B. DA COSTA, N. P. LOPES, and P. J. HEISE. 2003. “BRAZILIAN SPECIES OF VIGUIERA (ASTERACEAE) EXHIBITLOW LEVELS OF ITS SEQUENCE VARIATION”. Edinburgh Journal of Botany 57 (3): 323-32. https://doi.org/10.1017/S0960428600000330.