found: Blok, W. P.C. Boutens en de nalatenschap van Andries de Hoghe, 1983:t.p. (P.C. Boutens) p. 11 (pseud. Andries de Hoghe)
found: Groot gezinsverzenboek, 1985:p. 596 (P.C. Boutens; 1870-1943)
found: NUC pre-56(hdg.: Boutens, Petrus Cornelis, 1870-1943; usage: P.C. Boutens)
found: BL database, 26 June 2003(hdg.: Boutens, P. C. (Pieter Cornelis), 1870-1943)
found: KB online cat., Mar. 11, 2010(hdg.: Boutens, Pieter Cornelis, 1870-1943; usage: P.C. Boutens)
found: Wikipedia, viewed October 3, 2019(Pieter Cornelis Boutens ; born in Middelburg on February 20, 1870, died in The Hague on March 14, 1943 ; was a Dutch poet, translator, classicist, and mystic ; studied classical languages at the University of Utrecht ; was a teacher of classical languages at the Noorthey boarding school for boys in Voorschoten ; in 1915 became the president of the Dutch association of writers - Vereniging van Schrijvers en Vertalers ; published also under the pseudonym Andries de Hoghe) - https://en.wikipedia.org/wiki/Pieter_Cornelis_Boutens
