John Heron: ‘Co-Counselling Teacher’s Manual’ June 1978, The chapter about ‘Decision Making Models’ pg. 29-30 suggest other decision making processes as well as ‘consensus’!

Charles Landry et al. ‘What a way to run a railroad. An analysis of radical failure.’ in Comedia’s Series: Organisations & Democracy’
A splendid analysis why so many egalitarian organisations of the seventies failed...

Fran Rees: ‘How to lead work teams. Facilitation skills’ 1991.
One of the most ‘simple’, excellent books on facilitating meetings I have ever read.