Lea Hannola Samuli Kortelainen Hannu Kärkkäinen Markku Tuominen Utilizing front-end-of-innovation concepts in software development. 898-915 2009 109 Industrial Management and Data Systems 7 http://dx.doi.org/10.1108/02635570910982265 db/journals/imds/imds109.html#HannolaKKT09