Gyermekek napközbeni ellátása Európa fővárosaiban
Czech statistical office, Ministry of education, youth and sports, Istituto Nazionale di Statistica (ISTAT), Roma Open Data, Polish statistical office 2021, Warsaw Press Office 2022, Bisa Brussels, POBAL Annual Early Years Sector Profile Report 2020/2021, and Central Statistics Office Census 2016, Hungarian Statistical Office, Amt für Statistik Berlin-Brandenburg, Senatsverwaltunng für Bildung Berlin / Tagesspiegel Innovation Lab, ECIJA, Telex.hu