Asparuhova Ivanova, Iveta Aspects of Sustainability in Conventional Mass Tourism Covered in "Sustainable Tourism Theory and Practice" by David Weaver and the National Strategy of Sustainable Development of Tourism in Bulgaria 2009 - 2013,
Унив. изд. Наука и икономика, 2013, с. 133 - 137, 978-954-21-0669-2.