Laaksonen, Seppo, Teemu Kemppainen, Matti Kortteinen, Mats Stjernberg, Mari Vaattovaara, and Henrik Lönnqvist. “Tackling City-Regional Dynamics into a Survey Using Grid Sampling”. Survey Research Methods 9, no. 1 (April 10, 2015): 45–55. Accessed October 10, 2024. https://ojs.ub.uni-konstanz.de/srm/article/view/5832.