« The Ghost in the Machine. How Sociology Tried to Explain (Away) American Flying Saucers and European Ghost Rockets, 1946-1947 », in Alexander Geppert (ed.), Imagining Outer Space, European Astroculture in the Twentieth Century, New York, Macmillan, 2018, p. 224-244. Pierre Lagrange

https://www.academia.edu/37170468/_The_Ghost_in_the_Machine_How_Sociology_Tried_to_Explain_Away_American_Flying_Saucers_and_European_Ghost_Rockets_1946_1947_in_Alexander_Geppert_ed_Imagining_Outer_Space_European_Astroculture_in_the_Twentieth_Century_New_York_Macmillan_2018_p_224_244?rhid=28709765098&swp=rr-rw-wc-89359368