Managing industrial service offerings: requirements on content and processes. - Christian Kowalkowski; Per-Olof Brehmer; Daniel Kindstrom (Int. J. Serv. Technol. Manag., 2009)

Digital servitization: How data-driven services drive transformation. - Christian Kowalkowski; Bård Tronvoll; David Sörhammar; Alexey Sklyar (HICSS, 2022)