El Rhzaoui, Ghita, et al. “Biomonitoring of Air Pollutants by Using Lichens (Evernia Prunastri) in Areas Between Kenitra and Mohammedia Cities in Morocco”. Lazaroa, vol. 36, Dec. 2015, pp. 21-30, https://doi.org/10.5209/rev_LAZA.2015.v36.49486.