Prehistoric Beast digital restoration, as published on April 6, 2011 by the PhilTippett Studio's official channel in Youtube. [2012-03-19]. (原始内容存档于2020-11-20)
of Error", 1883, Phil Mag, pp. 300–309 "The Method of Least Squares", 1883, Phil Mag "The Physical Basis of Probability", 1883, Phil Mag "On the Method