Froehlich, Garry, James Hoover, and Paul Sorenson. “Realising Requirements in Product - Line Development Using O-O Frameworks (Invited Position Paper)”. Australasian Journal of Information Systems 6, no. 2 (May 1, 1999). Accessed April 26, 2024. https://journal.acs.org.au/index.php/ajis/article/view/289.