Four Grotesque Heads of Men

S. Fraschetti, Il Bernini. La sua vita, la sua opera, il suo tempo, Milan 1900, pp. 197, 198;

G. White, Italian Bronze Statuettes, exh. cat., Victoria & Albert Museum, London 1961, cat. no. 187;
A. van Schendel & J. Pope-Hennessy (eds.), Meesters van het brons der Italiaanse Renaissance, exh. cat., Rijksmuseum, Amsterdam 1961, cat. no. 182;
F. Borsi, C. Acidini Luchinat & F. Quinterio (eds.), Gian Lorenzo Bernini. Il testamento, la casa, la raccolta dei beni, Florence 1981, pp. 52, 108;
J. Montagu, Roman Baroque sculpture. The industry of art, New Haven & London 1989, p. 188, reproduced fig. 261;
A. Weston-Lewis (ed.), Scottish National Gallery, Effigies & Ecstasies. Roman Baroque sculpture and design in the age of Bernini, exh. cat., Scottish National Gallery, Edinburgh 1998, p. 92, under cat. no. 44;
F. Scholten, in Caravaggio Bernini: Early Baroque in Rome, G. Swoboda & S. Weppelmann (eds.), exh. cat., Kunsthistorisches Museum, Vienna and Rijksmuseum, Amsterdam, Munich 2019, pp. 279, 299 cat. no. 83, reproduced p. 278.

London, Victoria & Albert Museum, Italian Bronze Statuettes, 27 July – 1 October 1961, no. 187;

Amsterdam, Rijksmuseum, Meesters van het brons der Italiaanse Renaissance, 29 October 1961 – 14 January 1962, no. 182;

Vienna, Kunsthistorisches Museum & Amsterdam, Rijksmuseum, Caravaggio Bernini: Early Baroque in Rome, 15 October 2019 – 19 January 2020 (Kunsthistorisches Museum), 14 February – 7 June 2020 (Rijksmuseum), no. 83.