https://www.meteoschweiz.admin.ch/service-und-publikationen/publikationen/wissenschaftliche-publikationen/peer-reviewed/plant-phenological-observations-in-switzerlandthe-history-and-current-status-of-plant-phenology-in-europe-bruessel-2008-cost-action-725-166-169-doi-978-951-40-2091-9.html
Plant phenological observations in SwitzerlandThe history and current status of plant phenology in...
current statusplantobservations