Fuegi, J.; Francis, J. (2003). Lovelace & Babbage and the creation of the 1843 'notes'. Annals of the History of Computing. Vol. 25. pp. 18–26. doi:10.1109/MAHC.2003.1253887. ISSN1058-6180.
Fuegi, J.; Francis, J. (2003). Lovelace & Babbage and the creation of the 1843 'notes'. Annals of the History of Computing. Vol. 25. pp. 18–26. doi:10.1109/MAHC.2003.1253887. ISSN1058-6180.