Citation:
Tulla, A., Vera, A. & Pallares-Barbera, M., 2003. Local development, socioeconomic and natural externalities in mountain areas. ISBN: 80-86377-09-1. In Regional Geography and its applications. Brno (Txeck Republic). Brno (Txeck Republic): Academy of Sciences of the Czech Republic. Institute of Geonics, pp. 178-185.