National and regional economics. International conference. National and regional economics VII : international conference proceedings : 1th-3th october, 2008 : Herľany, Slovak Republic. Proceedings editor Vincent Šoltés. Košice : Technická univerzita v Košiciach, 2008. CD-ROM. Dostupné na : <http://www3.ekf.tuke.sk/konfera2008/zbornik/sk/index.htm> ISBN 978-80-553-0084-9.