John Ruskin (1872). “The Political Economy of Art: Being the Substance (with Additions) of Two Lectures Delivered at Manchester, July 10th and 13th, 1857”, p.124
"Steve Ballmer talks about the current state of Microsoft, his Twitter investment, and how sports tech can help the Clippers". Interview with Matt Rosoff, www.businessinsider.com. February 6, 2016.