Juan Manuel Fullaondo, "El laberinto de la obra de Eduardo Chillida (II)," En Nueva Forma , Madrid, 1967, p. 56
Claude Esteban, Chillida , Paris, 1971, p. 91, no. 38, illustrated
Werner Schmalenbach, Eduardo Chillida: Zeichnungen, Hände 1949-1974, Frankfurt, 1977, p. 5, illustrated
Werner Schmalenbach, Eduardo Chillida: Dibujos, Manos 1949-1974, Barcelona, 1979, p. 5, illustrated
Exh. Cat. (and catalogue raisonné), Pittsburgh, Pittsburgh Museum of Art, Carnegie Institute, Chillida , 1979, p. 60, no. 82, illustrated
Exh. Cat., Bonn, Städtisches Kunstmuseum Bonn; Munster, LWL-Museum für Kunst und Kultur, Eduardo Chillida, Zeichnung als Skulptur 1948-1989 , June - November 1989, p. 22, illustrated in colour
Ignacio Chillida Belzunce and Alberto Cobo, Eduardo Chillida: Catalogue Raisonné of Sculpture, San Sebastián, 2014, p. 182, illustrated in colour
Begona Fernanedz Cabaleiro, "Preguntas, El cuaderno de notas de Eduardo Chillida," Escritura e Imagen, vol. 10, December 2014, p. 114, illustrated
Beatriz Matos Castaño, "Eduardo Chillida, arquitecto," Universidad Politécnica de
Madrid Publication, Madrid, 2015, p. 30, illustrated