Reference: Sérgio C., Carvalho P., Garcia C.A., Almeida E., Novais V., Sim-Sim M., Jordão H. & Sousa A.J. 2016. Floristic changes of epiphytic flora in the Metropolitan Lisbon area between 1980–1981 and 2010–2011 related to urban air quality. Ecological Indicators 67:839-852.
