Yes/no-object: a communicative object that tries to establish boundaries. - Holger Heissmeyer (AfriCHI, 2018)

Designing playful situations for strangers in urban areas. - Mark Mushiba; Holger Heissmeyer (AfriCHI, 2018)

Dérive: an exploration of critical play for urban place-making. - Mark Mushiba; Holger Heissmeyer (AfriCHI, 2018)