Chrzanowska M, Drejerska N, Pomianek I. AN ATTEMPT TO DETERMINE THE FUNCTIONAL AREA OF WARSAW WITH THE USE OF THE MEASURE OF RELATIVE DEVELOPMENT LEVEL AND HELLWIG'S MEASURE. aspe [Internet]. 2013Mar.30 [cited 2024Dec.22];12(1):5-15. Available from: https://js.wne.sggw.pl/index.php/aspe/article/view/4069