The upward shift in altitude of pine mistletoe (Viscum album ssp. austriacum) in Switzerland - the result of climate warming?

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Dobbertin, M., Hilker, N., Rebetez, M., Zimmermann, N. E., Wohlgemuth, T., & Rigling, A. (2005). The upward shift in altitude of pine mistletoe (Viscum album ssp. austriacum) in Switzerland - the result of climate warming? International Journal of Biometeorology, 50, 40-47. http://doi.org/10.1007/s00484-005-0263-5