Source: https://www.researchgate.net/profile/Pierre_Etevenon/post/What_is_the_relationship_between_altered_states_of_consciousness_and_Dreams/attachment/59d621dd79197b80779803be/AS:298874896961537@1448268736351/download/3e Millénaire - Article Pierre Etevenon - Décembre 2013.pdf