Dotremont, 1958; in La jeune Ecole de Paris, Jean-Clarence Lambert; Le Musée de Poche, Paris, 1958; as quoted in (MR1, 127); Karel Appel, a gesture of colour, Jean-François Lyotard, (original French text of 1992 based upon intensive correspondence with Karel Appel), Christine Buci-Glucksmann, Herman Parret; University Press, Leuven, Belgium, 2009, p. 103https://en.wikiquote.org/wiki/Karel_Appel