Methods for quantitative usability requirements: a case study on the development of the user interface of a mobile phone. - Timo Jokela; Jussi Koivumaa; Jani Pirkola; Petri Salminen; Niina Kantola (Pers. Ubiquitous Comput., 2006)

Determining High Level Quantitative Usability Requirements: A Case Study. - Niina Kantola; Timo Jokela (HCI (1), 2007)

SVSb: simple and visual storyboards: developing a visualisation method for depicting user scenarios. - Niina Kantola; Timo Jokela (OZCHI, 2007)