https://medium.com/a-computer-of-ones-own/kateryna-l-yushchenko-inventor-of-poin...

		based2 on March 21, 2020 \| parent \| context \| favorite \| on: Kateryna Yushchenko https://medium.com/a-computer-of-ones-own/kateryna-l-yushche... https://www.reddit.com/r/todayilearned/comments/flztwo/til_t... -> https://en.wikipedia.org/wiki/Plankalk%C3%BCl