European pollen reanalysis, 1980?2022, for alder, birch, and olive, Sofiev, Mikhail, Palamarchuk Julia, Kouznetsov Rostislav, Abramidze Tamuna, Beverley Adams-Groom, Antunes Célia M., Ariño Arturo H., Bastl Maximilian, Belmonte Jordina, Berger Uwe E., et al. , Scientific Data, Jan-12-2024, Volume 11, Issue 1, (2024)