Do Computers Solve the Problem? Telephone vs. Telefax vs. Computers in Home Shopping Systems in Scandinavia. - Mari Anne Karlsson; Matti A. Kaulio (HCI (1), 1993)

Triangulation strategies in user requirements investigations: A case study on the development of an IT-mediated service. - Matti A. Kaulio; I. C. Marianne Karlsson (Behav. Inf. Technol., 1998)