https://experts.umn.edu/en/publications/studying-boojums-in-n2-theory-with-walls-and-vortices/
Studying boojums in N=2 theory with walls and vortices - Experts@Minnesota
https://blogs.bmj.com/bmj/2017/02/17/jeffrey-aronson-when-i-use-a-word-snakes-snarks-and-boojums/
Jeffrey Aronson: When I use a word . . . Snakes, snarks, and boojums - The BMJ
Aug 10, 2017 - Last week I discussed the origins of words to do with snakes, such as serpent and sepsis, derived from the IndoEuropean root SERP, meaning to creep or crawl....