Susie Brackenborough; Tom McLean; David Oldroyd (2001). "The Emergence of Discounted Cash Flow Analysis in the Tyneside Coal Industry c.1700-1820". British Accounting Review. 33 (2): 137–155. doi:10.1006/bare.2001.0158., pp.137, 140.
Chan, Louis K.C.; Karceski, Jason; Lakonishok, Josef (May 2001). The Level and Persistence of Growth Rates. Cambridge, MA. doi:10.3386/w8282.{{cite book}}: CS1 maint: location missing publisher (link)
Sroufe, Robert (5 October 2018). Integrated management : how sustainability creates value for any business. Emerald Group. ISBN978-1787145627. OCLC1059620526.