Veleva, V., Bodkin, G., Bogdanova, S. (2017) The Need for Better Measurement and Employee Engagement to Advance a Circular Economy: Lessons from Biogen's "Zero Waste" Journey, Oxford: Butterworth-Heinemann, Ltd. pp. 517 - 529, ISSN 0959-6526 (print) ; 1879-1786 (online).