Antikainen, Harri, Jarmo Rusanen, Sami Vartiainen, Mauri Myllyaho, Jari Karvonen, Markku Oivo, and Kari Laine. 2006. “Location-Based Services As Tool for Developing Tourism in Marginal Regions”. Nordia Geographical Publications 35 (2):39–50. https://nordia.journal.fi/article/view/76202.