Scheidegger, C., & Goward, T. (2002). Monitoring Lichens for Conservation: Red Lists and Conservation Action Plans. In P. L. Nimis, C. Scheidegger, & P. A. Wolseley (Eds.), NATO science series. Series IV: earth and environmental sciences: Vol. 7. Monitoring with lichens – monitoring lichens (pp. 163-181). https://doi.org/10.1007/978-94-010-0423-7_12