http://www.bbc.com/earth/story/20150312-the-worlds-most-painful-insect-sting
https://www.esquire.com/lifestyle/health/a37149/what-feels-like-stung-by-most-painful-insect/
https://www.businessinsider.com/milking-a-bullet-ant-2015-6
http://www.fromthelabbench.com/the-worst-pain-known-to-man-its-a-stinger/
https://web.expasy.org/spotlight/back_issues/014/
https://febs.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1432-1033.2004.04128.x
https://www.realclearscience.com/blog/2015/03/the_surprising_benefits_of_the_worst_pain_known_to_man.html