Lechowicz, K., Bocianowski, J. and Wrońska-Pilarek, D. 2021. Pollen morphology and variability of species from the genus Rubus L. (Rosaceae) alien and invasive in Poland. Webbia. 76, 1 (Apr. 2021), 109–121. DOI:https://doi.org/10.36253/jopt-10355.