Helen Sharp Hugh Robinson Mark Woodman 2000 17 IEEE Softw. 1 https://doi.org/10.1109/52.819967 http://doi.ieeecomputersociety.org/10.1109/52.819967 https://www.wikidata.org/entity/Q121436093 db/journals/software/software17.html#SharpRW00 40-47