Kayla overnight sources

Butane
https://www.adamsgas.co.uk/2017/08/21/everything-need-know-butane/

Hallyu
https://business.financialpost.com/news/retail-marketing/how-korea-became-the-worlds-coolest-brand

https://www.economist.com/books-and-arts/2014/08/09/soap-sparkle-and-pop

http://edition.cnn.com/2010/WORLD/asiapcf/12/31/korea.entertainment/index.html?iref=NS1

http://nwww.koreaherald.com/common_prog/newsprint.php?ud=20120924000627&dt=2