https://gigazine.net/news/20180415-grammarly/

https://www.hokkaido-np.co.jp/article/180180

https://bookman.co.jp/shop/health/9784893088970/ https://twitter.com/okaguchik/status/822360547907674113

https://mainichi.jp/articles/20180412/ddm/004/010/037000c

https://www3.nhk.or.jp/news/html/20180414/k10011403711000.html