10th International conference on applied economics [elektronický zdroj] : contemporary issues in economy, Toruň, Poland 27-28 June 2019, abstract book . Olsztyn :  Institute of Economic Research , 2019 . 293 s . ISBN 978-83-65605-10-8
http://economic-research.pl/Books/index.php/eep/catalog/view/39/42/63-1 .