Chanoine C.H. de Labonnefon, Croquis Entomologiques, Paris, Maison de la Bonne Presse, 1923, p. 54-57.
Archives du mot-clé invention
Stones that move
Floyd Bralliar, Knowing insects through stories, New-York, Funk & Wagnalls Company, (1918) 1921, pp. 202-207.