Colin Ward
Ward, Colin, Housing: An Anarchist Approach
Ward, a leading anarchist theorist and expert on housing, examines the post-1945 British squatters movement (pp. 13-27) and assesses the revival of squatting between 1968 and early 1970s.
Ward, Colin, Cotters and Squatters: The Hidden History of Housing
A social history that goes up to end of 20th century, primarily discusses British examples, but has references to many other countries.
The online version of Vol. 1 of the bibliography was made possible due to the generous support of the 
The online version of Vol. 2 of the bibliography was made possible due to the generous support of