Crown Forest Industries Ltd. v. Canada (1995) 2 S.C.R. 802; Klaus Vogel on Double Taxation Conventions: A Commentary to the OECD-, UN-, and US Model Conventions for Avoidance of Double Taxation of Income and Capital, with particular reference to German Treaty Practice, 3rd ed. The Hague: Kluwer Law International, 1997. P. 43.