@article{Ertur2006,
author = {Ertur, C. and Koch, W.},
title= {Regional disparities in the European Union and the enlargement process: An exploratory spatial data analysis, 1995–2000},
year = {2006},
doi = {10.1007/s00168-006-0062-x},
volume = {40},
number = {4},
pages = {723--765},
}