http://onlinelibrary.wiley.com/doi/10.1002/9781444393552.ch35/summary

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2614680/

 

http://www.slate.com/articles/technology/future_tense/2017/03/why_we_are_so_alarmed_by_the_idea_of_a_moral_enhancement_pill.html

 

http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199653645.001.0001/acprof-9780199653645