“Smoot in Stone”. MIT News. Cambridge, Massachusetts: Massachusetts Institute of Technology (June 4, 2009). July 20, 2010閲覧。 “Specifically noting the bridge's length of 364.4 Smoots (+/− 1 ear), the plaque, a gift of the MIT Class of 1962, honors the prank's 50th anniversary.”
Durant, Elizabeth (June 23, 2008). “Smoot's Legacy”. MIT Technology Review. Massachusetts Institute of Technology. 2023年8月7日閲覧。 “... so they added the plus or minus, and wrote the e in ear as an epsilon. 'The epsilon referred in a cutesy way to this error measurement,' [Smoot] says. And therein lies another detail that has evolved over time: the epsilon has been lost from written accounts of the story, Smoot says, and the minus sign is often omitted as well.”
