“Google debuts knowledge project”. BBC (2007年12月15日). 2007年12月15日閲覧。 “Many experts see the initiative as an attack on the widely used Wikipedia communal encyclopaedia.”
Manber, Ubi (2007年12月13日). “Encouraging people to contribute knowledge”. Google. 2008年12月7日閲覧。 “Earlier this week, we started inviting a selected group of people to try a new, free tool that we are calling "knol", which stands for a unit of knowledge. Our goal is to encourage people who know a particular subject to write an authoritative article about it.”
Sullivan, Danny (2007年12月13日). “Google Knol - Google's Play To Aggregate Knowledge Pages”. Search Engine Land. 2007年12月17日閲覧。 “Google Knol is designed to allow anyone to create a page on any topic, which others can comment on, rate, and contribute to if the primary author allows. [...] Google also stressed to me [...] that the service might not launch at all.”
Blakely, Rhys (2007年12月15日). “Google to tackle Wikipedia with new knowledge service”. The Times. 2007年12月15日閲覧。 “[K]nol looks set to foster rivalry. Contributors to knolwill not be able to contribute anonymously and will not be able to edit each other’s work, [...]. Whereas on Wikipedia, readers find only one entry on, say, the First World War, on knol authors will submit separate pieces that will compete for advertising dollars.”
