Turóci, Ágnes, Fehér, Z., Krízsik, V. és Páll-Gergely, B. 2020. Two new alien slugs, Krynickillus melanocephalus Kaleniczenko, 1851 and Tandonia kusceri (H. Wagner, 1931), are already widespread in Hungary. Acta Zoologica Academiae Scientiarum Hungaricae. 66, 3 (aug. 2020), 265–282. DOI:https://doi.org/10.17109/AZH.66.3.265.2020.