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Bryson, Alex and Freeman, Richard B. (2006) What voice do British workers want? CEPDP, 731. Centre for Economic Performance, London School of Economics and Political Science, London, UK. ISBN 0753020270
Iyengar, Radha (2008) I'd rather be hanged for a sheep than a lamb: the unintended consequences of 'three-strikes' laws. NBER working papers, 13784. National Bureau of Economic Research, Cambridge, USA.
Seeleib-Kaiser, Martin and Fleckenstein, Timo (2009) The political economy of occupational family policies: comparing workplaces in Britain and Germany. British journal of industrial relations, 47 (4). pp. 741-764. ISSN 0007-1080