https://erowid.org/references/refs_view.php?ID=1237&S=consciousness&SField=All
Erowid.org: Erowid Reference 1237 : Subject expectancy and environmental factors as determinants of...
The Index page for the reference article: Heaton RK Subject expectancy and environmental factors as determinants of psychedelic flashback experiences J Nerv...
erowid orgsubject expectancy