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2Nicholas luviene, Amy Stitely, Lorlene Hoyt. Sustainable Economic Democracy : Worker Cooperatives for the 21st Century. A publication series produced by the MIT Community Innovators Lab with support from the Barr Foundation, October 2010.
3Bruno Roelants, Disna Dovgan, Hyungsik Eum, Elisa Terrasi. The resilience of the cooperatives model, http://ec, europa, eu/progress,2012,6.