Øverby, Harald Introduction to digital economics : foundations, business models and case studies / Harald Øverby, Jan Arild Audestad. -- Cham : Springer, [2021]. -- ©2021. -- (Classroom companion: business). -- ISBN : 978-3-030-78236-8 (vázáno). Audestad, Jan Arild. *2Classroom companion: business0