If applicable, below each article is included the list of literature that is more specific to the article’s topic. The list of resources I’m using on regular basis is as follows:
Tolman T., Lewington R.: Collins Butterfly Guide, (2009)
Eckweiler W., Bozano GC.: Guide to the Butterflies of the Palearctic Region, Satyrinae Part IV, (2011)
Sbordoni V., Cesaroni D., Coutsis JG., Bozano GC.: Guide to the Butterflies of the Palearctic Region, Satyrinae Part V, (2018)
Eckweiler W., Bozano GC.: Guide to the Butterflies of the Palearctic Region, Lycaenidae, Part IV, (2016)
Leraut P.: Butterflies of Europe, N.A.P Editions, (2016)
Grieshuber J.: Guide to the Butterflies of the Palearctic Region, Pieridae Part II, (2014)
Lorković Z.: The Rhopalocera Fauna of Croatia with Special Respect to the Fauna of Plitvice Lakes, Entomol. Croat., (2009)
Pamperis L. N.: The Butterflies of Greece, (2009)
Nikolić T. ed. (2004) baza nalaza Flora Croatica Database (FCD), http://hirc.botanic.hr/
https://biologer.hr
https://www.inaturalist.org/
https://www.butterfliesoffrance.com/
https://www.leps.it
http://www.eurobutterflies.com/
http://www.pyrgus.de/
https://www.euroleps.ch/
https://pamperis.gr/
https://lepidoptera.eu/
https://butterfly-conservation.org/