Klein, Alexandra-MariaAlexandra-MariaKleinOlschewski, RolandRolandOlschewskiKremen, ClaireClaireKremen2018-11-072018-11-072008https://resolver.sub.uni-goettingen.de/purl?gro-2/55416The ecosystem service controversy: Is there sufficient evidence for a "pollination paradox"?journal_article000254299400003