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Fisher, Len (11 de febrero de 1999). «Physics takes the biscuit». Nature397 (6719): 469. Bibcode:1999Natur.397..469F. doi:10.1038/17203. «Washburn will be turning in his grave to learn that the media have renamed his work the "Fisher equation".»
«The 1999 Ig Nobel Prize Ceremony». improbable.com. Improbable Research. Consultado el 7 de octubre de 2015. «Len Fisher, discoverer of the optimal way to dunk a biscuit.»