Nancy Leveson (1995). «Medical Devices: The Therac-25 (PDF)». En Addison-Wesley, ed. Safeware:System Safety and Computers. Archivado desde el original el 16 de febrero de 2008. Consultado el 16 de mayo de 2020.
«Was the first computer ‘bug’ a real insect?»(html). Oxford Living Dictionaries(en British English). Archivado desde el original el 2 de abril de 2017. Consultado el 15 de julio de 2018. «The term in fact originates not with computer pioneers, but with engineers of a much earlier generation. The first example cited in the 20-volume historical Oxford English Dictionary is from the Pall Mall Gazette of 11 March 1889: "Mr. Edison, I was informed, had been up the two previous nights discovering 'a bug' in his phonograph - an expression for solving a difficulty, and implying that some imaginary insect has secreted itself inside and is causing all the trouble." It seems clear from this that the original ‘bug’, though it was indeed an insect, was in fact imaginary.»
«Was the first computer ‘bug’ a real insect?»(html). Oxford Living Dictionaries(en British English). Archivado desde el original el 2 de abril de 2017. Consultado el 15 de julio de 2018. «The term in fact originates not with computer pioneers, but with engineers of a much earlier generation. The first example cited in the 20-volume historical Oxford English Dictionary is from the Pall Mall Gazette of 11 March 1889: "Mr. Edison, I was informed, had been up the two previous nights discovering 'a bug' in his phonograph - an expression for solving a difficulty, and implying that some imaginary insect has secreted itself inside and is causing all the trouble." It seems clear from this that the original ‘bug’, though it was indeed an insect, was in fact imaginary.»
Nancy Leveson (1995). «Medical Devices: The Therac-25 (PDF)». En Addison-Wesley, ed. Safeware:System Safety and Computers. Archivado desde el original el 16 de febrero de 2008. Consultado el 16 de mayo de 2020.
