1. Gehrig Bichsel, R., Maurer, F., & Schwierz, C. (2017). Regionale Pollenkalender der Schweiz. Fachbericht MeteoSchweiz, 264, 43 pp.
2. Kirk, P., Cannon, P., David, J., & Stalpers, J. (2001). Ainsworth & Bisby’s Dictionary of the Fungi. Wallingford, Oxon: CAB International.
3. Spieksma, F. T. M. (1991). Regional European Pollen Calendar. In G. D’Amato, F. T. M. Spieksma, & S. Bonini (Eds.), Allergenic Pollen and Pollinosis in Europe. Oxford, London, Edinburg, Boston, Melbourne, Paris, Berlin, Vienna: Blackwell Scientific Publications.