Evaluation of hybrid front- and back-of-device interaction on mobile devices. - Markus Löchtefeld; Christoph Hirtz; Sven Gehring (MUM, 2013)

Managing smartwatch notifications through filtering and ambient illumination. - Frederic Kerber; Christoph Hirtz; Sven Gehring; Markus Löchtefeld; Antonio Krüger (MobileHCI Adjunct, 2016)