Müller-Frączek, Iwona, and Michał Bernard Pietrzak. 2009. “Comparative Analysis of the Economic Development of the Kujawsko- Pomorskie Province in the Years 2003 I 2007 With the Use of the Tools of Spatial Statistics”. Acta Universitatis Nicolai Copernici Ekonomia 39 (September):137-46. https://doi.org/10.12775/AUNC_ECON.2009.033.