Any use of the NPP-ID data should include references to the last papers on the NPP-ID

Shumilovskikh L.S., Shumilovskikh E.S., Schlütz F., van Geel B. (2022) NPP-ID - Non-Pollen Palynomorphs Image Database as a research and educational platform. Vegetation History and Archaeobotany, 31, 323-328. DOI: 10.1007/s00334-021-00849-8.

Shumilovskikh L.S., Shumilovskikh E.S., Schlütz F., van Geel B. (2022) Correction: NPP-ID - Non-Pollen Palynomorphs Image Database as a research and educational platform. Vegetation History and Archaeobotany, 31, 323-328. DOI: 10.1007/s00334-021-00849-8.