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Randerson، James (يوليو 2008). "Who stopped the future?". IPC Media ع. 112: 104. ISSN:1364-4475. OCLC:948263254. 'The big problem was that it had no market,' says Woordward. 'Globa warming hadn't been invented then'
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Flint، James (فبراير 1996). "Charge!". Wired. ج. 2 رقم 02. مؤرشف من الأصل في 2020-02-14.