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Boyko, E.V. and Novozhilova, E.V. 2022. Structure of the seed coat of the species of Asteraceae. II (tribe Heliantheae). Turczaninowia. 25, 2 (Jun. 2022), 163-180. DOI:https://doi.org/10.14258/turczaninowia.25.2.16.