Douglas Adams (2012). “The Hitchhiker's Guide to the Galaxy Radio Scripts Volume 2: The Tertiary, Quandary and Quintessential Phases”, p.83, Pan Macmillan
"Albert Brooks Wrote a Novel About The Future. He’s A Comedian. It’s Kind Of Funny. But Also: Good" by Jesse Kornbluth, www.huffingtonpost.com. October 5, 2011.