Polish long-term interdisciplinary co-operation scientists, youth and local communities for the promotion of eco-tourism and sustainable development in regions of particular natural and cultural values in Poland, Spain and Italy / Jan W. DOBROWOLSKI, Aleksandra WAGNER, Małgorzata ŚLIWKA, Robert MAZUR, Mateusz JAKUBIAK // W: EURO-ECO 2006 : 11\textsuperscript{th} international conference : interdisciplinary co-operation for the sustainable development of historical cities and protected areas perspectives of sound tourism : Kraków 18\textsuperscript{th}–19\textsuperscript{th} September 2006 / eds. Aleksandra Wagner, Jan W. Dobrowolski ; Katedra Biotechnologii Środowiskowej i Ekologii. — [Kraków : s. n.], [2006]. — Opis wg okł.. — S. 30–31

The main purposes of the 11\textsuperscript{th} international conference on Interdisciplinary co-operation for the sustainable development of historical cities and protected areas : perspectives of sound tourism / Jan W. DOBROWOLSKI // W: EURO-ECO 2006 : 11\textsuperscript{th} international conference : interdisciplinary co-operation for the sustainable development of historical cities and protected areas perspectives of sound tourism : Kraków 18\textsuperscript{th}–19\textsuperscript{th} September 2006 / eds. Aleksandra Wagner, Jan W. Dobrowolski ; Katedra Biotechnologii Środowiskowej i Ekologii. — [Kraków : s. n.], [2006]. — Opis wg okł.. — S. 11–12