Young stellar populations in early-type dwarf galaxies - Occurrence, radial extent, and scaling relationsE. Hamraz, R. F. Peletier, H. G. Khosroshahi, E. A. Valentijn, M. den Brok and A. VenholaA&A, 625 (2019) A94DOI: https://doi.org/10.1051/0004-6361/201935076