Pandemic platform governance: Mapping the global ecosystem of COVID-19 response apps. - Michael Dieter; Anne Helmond; Nathaniel Tkacz; Fernando N. van der Vlist; Esther Weltevrede (Internet Policy Rev., 2021)

Super-appification: Conglomeration in the global digital economy. - Fernando N. van der Vlist; Anne Helmond; Michael Dieter; Esther Weltevrede (New Media Soc., 2025)