@techreport{Kohler2002,
author = {Kohler, I. and Kaltchev, J. and Dimova, M.},
title= {Integrated information system for demographic statistics ‘ESGRAON TDS’ in Bulgaria},
year = {2002},
doi = {10.4054/DemRes.2002.6.12},
URL = {http://www.demogr.mpg.de/papers/working/wp-2002-010.pdf},
publisher = {Max Planck Institute for Demographic Research},
address = {Rostock},
number = {MPIDR Working Paper WP 2002-010},
}