Tweetology of Learning Analytics: What does Twitter tell us about the trends and development of the field? - Mohammad Khalil; Jacqueline Wong; Erkan Er; Martin Heitmann; Gleb Belokrys (LAK, 2022)

Usability Evaluation of NOW Interactions. - Rosaline Barendregt; Barbara Wasson; Martin Heitmann (MobiQuitous (2), 2023)