Development Research Group, Finance and Private Sector Development Unit (World Bank), 'Global Financial Inclusion (Global Findex) Database 2014 (Poland)', 2015
Development Research Group, Finance and Private Sector Development Unit (World Bank), 'Global Financial Inclusion (Global Findex) Database 2014 (Romania)', 2015
Development Research Group, Finance and Private Sector Development Unit (World Bank), 'Global Financial Inclusion (Global Findex) Database 2011 (Spain)', 2015
Development Research Group, Finance and Private Sector Development Unit (World Bank), 'Global Financial Inclusion (Global Findex) Database 2014 (United Kingdom)', 2015
Development Research Group, Finance and Private Sector Development Unit (World Bank), 'Global Financial Inclusion (Global Findex) Database 2014 (Montenegro)', 2015
World Bank Group (WBG); European Bank for Reconstruction and Development (EBRD); European Investment Bank (EIB), 'Enterprise Survey 2019 (Montenegro)', 2019
Centraal Bureau voor de Statistiek (CBS) (Statistics Netherlands); Minnesota Population Center (University of Minnesota), 'Veertiende Algemene Volkstelling (28 februari 1971); tevens Beroepstelling en Algemene Woningtelling 1971 - IPUMS Subset (Netherlands)', 2016
Development Research Group, Finance and Private Sector Development Unit (World Bank), 'Global Financial Inclusion (Global Findex) Database 2011 (Serbia)', 2015