P. Ketola

On User Experience Measurement Needs: Case Nokia

Virpi Roto, Pekka Ketola, Virpi Roto, 2009, Int. J. Technol. Hum. Interact..

Integrating Usability with Concurrent Engineering in Mobile Phone Development

Pekka Ketola, P. Ketola, 2002 .

Handheld Devices and Mobile Phones

Eija Kaasinen, Pekka Ketola, Anne Kaikkonen, 2009, The Universal Access Handbook.

Concurrent Usability Engineering

Pekka Ketola, P. Ketola, 2000, BCS HCI.

The Three Facets of Usability In Mobile Handsets

Pekka Ketola, Mika Roykkee, P. Ketola, 2001, CHI 2001.