V. S. Pylro, E. dos S. Cruz, G. F. Duarte, and A. R. Kozovits, “The increase of N availability via atmospheric deposition and the reproduction phenology in Habenaria caldensis Kraenzl. (Orchidaceae) in the Parque Estadual do Itacolomi (PEIT) - MG, Brazil”, Biota Neotrop., vol. 11, no. 2, Jun. 2011.