J. C. Menezes and T. R. Ramos,  "APPROACHING RECYCLING PACKAGING SYSTEM THROUGH SERVICE LOGIC: THE PROCESS OF MUTUAL VALUE CREATION", in Wastes 2013: 2nd Edition of the Int. Conf. and Exhibition WASTES: Solutions, Treatments and Opportunities, Cândida Vilarinho and Fernando Castro, Ed., Braga, 2013, pp. 715-720