Aabo D., 2006. Sustainable tourism realities: A case for adventure service tourism. Praca dyplomowa. School for International training in Battleboro, Vermont, USA [http://www.xola- consulting.com/Aabo_David_Adventure_Service_Tourism.pdf; 2008].
Acerbi E., Maltauro M., Gattera C., Povolo A., 1994. Guida ai Forti Italiani e Austriaci degli Altipiani. Itinerari e Storia. Gino Rossato Editor, Valdagno.
Bogdanowski J., 1993. Krajobraz warowny XIX/XX wieku: dzieje i rewaloryzacja. Wyd. Politechniki Krakowskiej, Kraków.
Bohdanowicz J., Bohdanowicz P., 2006. Stymulatory ekonomiczne i prawne polityki ekorozwoju dla turystyki. W: Problemy badawcze i metodologiczne politologii w Polsce. Red. M.J. Malinowski. Wyd. Uniwersytetu Gdańskiego, Gdańsk: 456-472.
Ceruti J., Trotti A., 2003. Parco Culturale Integrato „La Guerra Bianca: le sue genti, il suo tenitorio” [http://www.museoguerrabianca.it; 2008].
Charter for sustainable tourism [http://www.gdrc.org/uem/eco-tour/charter.html; 2008].
DrdAcky M., DrdAcky T., Creighton D., 2005. Impacts and risks generated by large visitor numbers (DRAFT). Program PICTURE: Pro-active management of the Impact of Cultural Tourism upon Urban Resources and Economies [http://www.culture-routes.lu/picture/IMG/ pdf/222_long_en.pdf; 24.04.2008].
Hunter C., Shaw J., 2007. The ecological footprint as a key indicator of sustainable tourism. Tour. Manag. 28: 46-57.
Kostrowicki A.S., 1992. System „Człowiek-środowisko” w świetle teorii ocen. Pr. Geogr. 159.
Olszewski M., 2007. Ślad wandala na ziemi. Tyg. Powsz. 51-52: 38-39.
Patterson T.M., Niccolucci V., Bastianoni S., 2007. Beyond “more is better”: ecological footprint accounting for tourism and consumption in Val di Merse, Italy. Ecol. Econ. 62: 747-756.
Robinson M., Pickard D., 2006. Tourism, Culture and Sustainable Development. UNESCO Publishing, Paris.
Schneider P., Heyniger C., 2006-2007. Adventure Travel Industry Research Round-Up. Xola Consulting, Sante Fe, New Mexico. [http://www.xolaconsulting.com; 2008].