In Jörg Siekmann (ed), Handbook of the History of Logic, vol. 9: Computational Logic, Elsevier, pp. 135-214 (2014).
@INPROCEEDINGS{harrison-itp,
author = "John Harrison and Josef Urban and Freek Wiedijk",
title = "History of Interactive Theorem Proving",
editor = "J\{"o}rg Siekmann",
booktitle = "Handbook of the History of Logic vol. 9
(Computational Logic)",
publisher = "Elsevier",
year = 2014,
pages = "135--214"}