Gather, Matthias. “Accessibilities and Population Potentials of ‘central place’: An Approach from Thuringia”. Raumforschung und Raumordnung | Spatial Research and Planning 61, no. 3 (March 31, 2003): 211–222. Accessed May 3, 2024. https://rur.oekom.de/index.php/rur/article/view/1620.