Jachula, Jacek, Malgorzata Wrzesien, Monika Strzalkowska-Abramek, and Bozena Denisow. 2018. “The Impact of Special-Temporal Changes in Flora Attributes and Pollen Availability on Insect Visitors in Lamiaceae Species”. Acta Botanica Croatica 77 (2). https://www.abc.botanic.hr/index.php/abc/article/view/1930.