Copyright

Photo reproductions are freely available for study and research purposes, however not for commercial activities. How to state their source in publishing: 

Photo by Dávid Doroš, Stredoveká nástenná maľba na Gemeri  / Medieval mural in Gemer (www.medievalmuralgemer.com) 

Quotation example: 

Peter Megyeši, Kraskovo. In: Stredoveká nástenná maľba na Gemeri / Medieval mural in Gemer (www.medievalmuralgemer.com)