1
Published 2009
Government Office for Development and European Affairs

2
Published 2009
Socius d.d.

3
Published 2012
Ministry of Finance, Slovenia

4
Published 2015
OECD Publishing

5
by Jan Oplotnik, Žan
Published 2013
Institute for Local Self-Government and Public Procurement Maribor

6
by Rožen, Tomaž
Published 2015
Institute for Local Self-Government and Public Procurement Maribor