GERECKE, R., M. CANTONATI, D. SPITALE, E. STUR, and S. WIEDENBRUG. “The Challenges of Long-Term Ecological Research in Springs in the Northern and Southern Alps: Indicator Groups, Habitat Diversity, and Medium-Term Change”. Journal of Limnology, vol. 70, no. s1, Sept. 2011, pp. 168-87, doi:10.4081/jlimnol.2011.s1.168.