(en) Anders Persson, Early Operational Numerical Weather Prediction outside the USA, NOAA, , 99 p. (lire en ligne [PDF]), p. 25 (The Sutcliffe development equation 1939-50) « Together with a Belgian mathematician Odon Godart, Sutcliffe introduced pressure as a vertical coordinate (Sutcliffe and Godart, 1943; Godart, personal communications 1993-96) »