Asclepias syriaca I. is a threat to biodiversity and agriculture of Ukraine.

Shuvar, I., Korpita, H., Balkovskyi, V., Shuvar, A., Kropyvnytskyi, R., (2021). BIO Web of Conferences 36 EDP Sciences S.A., Les Ulis, France. English language

Řepeň polabská (Xanthium albinum (Widder) H. Scholz et Sukopp) v řepě cukrové. / Xanthium albinum (Widder) H.Scholz et Sukopp in sugar beet.

Štrobach, J., Mikulka, J., (2021). Listy Cukrovarnické a Reparské 137(5/6), 196-200. VUC Praha a.s., Prague, Czech Republic. Czech language

Does lake eutrophication support biological invasions in rivers? A study on Dreissena polymorpha (Bivalvia) in lake-river ecotones.

Czerniawski, R., Krepski, T., (2021). Ecology and Evolution 11(18), 12686-12696. Wiley, Oxford, UK. English language

Grindelia squarrosa in Ukraine: current distribution and ecological and coenotic peculiarities.

Protopopova, V. V., Didukh, Y. P., Tkachenko, V. S., Shevera, M. V., Kucher, O. O., Zavialova, L. V., Biatov, A. P., (2021). Hacquetia 20(2), 263-272. Sciendo, Warsaw, Poland. English language

Invasion, distribution and habitat affiliation of Cyperus esculentus, a new weed in Slovenia.

Vreš, B., Šilc, U., (2021). Hacquetia 20(2), 291-302. Sciendo, Warsaw, Poland. English language

New findings of steppe species of crickets Oecanthus pellucens (Scopoli, 1763) and Modicogryllus frontalis (fieber, 1844) (Orthoptera, Ensifera, Gryllidae) in Belarus.

Ostrovsky, A. M., (2021). Russian Journal of Biological Invasions 12(3), 299-301. Pleiades Publishing, Moscow, Russia. English language

Being dark is better: a feral pigeon plumage polymorphism as a response to urban environments in Slovakia.

Csanády, A., Duranková, S., (2021). Ekológia (Bratislava) 40(1), 54-61. Sciendo, Warsaw, Poland. English language

First record of Aceria granati (Canestrini et Massalongo, 1894) in Slovakia - short communication.

Kollár, J., Bakay, L., Paulen, O., (2021). Horticultural Science 48(3), 141-143. Czech Academy of Agricultural Sciences, Prague, Czech Republic. English language

Assessment of microclimatic conditions in Phragmitetum australis cenoses in the Dniester mouth area under the influence of Zizania latifolia invasion.

Dvoretskiy, T. V., (2021). Hydrobiological Journal 57(1), 3-11. Begell House Inc, New York, USA. English language

Erigeron karvinskianus. Subspontaneous thriving in the Upper Soča Valley, novelty of the exotic flora of the Julian Alps.

Dakskobler, I., Dakskobler, L., (2021). Hladnikia(48), 17-21. Botanical Society of Slovenia, Ljubljana, Slovenia. English language