group, C. s., Damialis, A., Gilles, S., Sofiev, M., Sofieva, V., Kolek, F., . . . Traidl-Hoffmann, C. (2021). Higher airborne pollen concentrations correlated with increased SARS-CoV-2 infection rates, as evidenced from 31 countries across the globe. Proceedings of the National Academy of Sciences of the United States of America, 118(12), 1.

group, COVID-19/POLLEN study, et al. "Higher Airborne Pollen Concentrations Correlated with Increased SARS-CoV-2 Infection Rates, as Evidenced from 31 Countries Across the Globe." Proceedings of the National Academy of Sciences of the United States of America 118, no. 12 (2021): 1.

group, COVID-19/POLLEN study, et al. "Higher Airborne Pollen Concentrations Correlated with Increased SARS-CoV-2 Infection Rates, as Evidenced from 31 Countries Across the Globe." Proceedings of the National Academy of Sciences of the United States of America, vol. 118, no. 12, 2021, p. 1.