I've cited a couple of books in passing a week or so back, without being able to be precise.
1: P. Lafargue 'Right to be Lazy and Other Studies', published by numerous.
2:A. Buick & J. Crump 'State Capitalism: The Wages System under New Management' pub. Macmillan, 1986.
(I'm also Told Crump's 'Non Market Socialism' is a worthwhile read, but can't find it myself.)
Further, I'm working most weeks at Party head Office, so if anyone out there is passing along Clapham high Street (London), feel free to drop by Monday, tuesday or wednesday. ;) Make a change from salespersons...