↑ Wouters, Mark; Selto, Frank H.; Hilton, Ronald W.; Maher, Michael W. (2012): Cost Management: Strategies for Business Decisions, International Edition, McGraw-Hill, p. 535.
↑ World Trade Organization (2004): United States - Final dumping determination on softwood lumber from Canada, WT/DS264/AB/R, 11 August 2004.
