https://foucault.info/parrhesia/
https://press.uchicago.edu/ucp/books/book/chicago/D/bo27178077.html
See also
https://www.airitilibrary.com/Article/Detail/02588412-201606-201708170020-201708170020-57-91
https://www.amazon.com/Courage-Michel-Foucault-Lectures-Coll%C3%A8ge/dp/1403986681