Source: https://matheo.uliege.be/bitstream/2268.2/7948/5/Les%20m%C3%A9canismes%20de%20l%27%C3%A9tranget%C3%A9%20%C3%A0%20l%27origine%20de%20l%27effet%20po%C3%A9tique%20chez%20Jean%20Cocteau.pdf