Mäeltsemees, S., Lõhmus, M., Ratas, J. Inter-municipal cooperation : possibility for advancing local democracy and subsidiarity in Estonia // Halduskultuur = Administrative culture = Административная культура = Verwaltungskultur = Hallintokulttuuri. Vol. 14, no. 1. Tallinn : Ragnar Nurkse School of Innovation and Governance, Tallinn University of Technology, 2013. p. 73-97. (Halduskultuur = Administrative culture = Административная культура = Verwaltungskultur = Hallintokulttuuri, ISSN 1736-6070 ; vol. 14, no.1). https://artiklid.elnet.ee/record=b2647174*est