KOSZTYI, David - KOVÁCS, Attila. What can be the main goals of the 21st century's company, or the role of sustainable development in corporate strategy, and it´s demonstration through green projects analysis. In Business management - practice and theory in the 21st century. 1. vyd. 1 CD-ROM (833 s.). ISBN 978-80-552-1026-1. Manažment podniku - prax a teória 21. storočia. Nitra : Slovak University of Agriculture, 2013, s. 288-293. Dostupné na internete:<http://www.slpk.sk/eldo/2013/zborniky/032-13/se2/Kosztyi_Kovacs.pdf>