Varian, Hal (1992). «Choice». Microeconomic Analysis (Third ed.). New York: W.W. Norton. էջ 117. ISBN978-0-393-95735-8. Վերցված է 2019 թ․ հոկտեմբերի 4-ին. «[...] as the consumer gets more income, he consumes more of both goods but proportionally more of one good (the luxury good) than of the other (the necessary good).»
Kren, Thomas, Illuminated Manuscripts of Germany and Central Europe in the J. Paul Getty Museum, 2009, pp. 7-9, J. Paul Getty Museum, ISBN 9780892369485, google books
Belozerskaya, Marina, Luxury Arts of the Renaissance, 2005, J. Paul Getty Museum, ISBN 9780892367856, google books; Lapatin, 1-10 (and throughout)
Seo, Yuri; Oliver, Margo Buchanan (2015). «Luxury branding: the industry, trends, and future conceptualisations». Asia Pacific Journal of Marketing and Logistics. 27 (1): 82–98. doi:10.1108/APJML-10-2014-0148.
