https://www.kingarthurflour.com/professional/preferments.html
https://www.breadworld.com/education/history-of-yeast/
https://www.exploreyeast.com/article/the-history-of-yeast
https://redstaryeast.com/science-yeast/story-yeast/
https://www.chicagotribune.com/news/ct-xpm-1986-02-09-8601100787-story.html
https://www.toastale.com/beers-history/
https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae
https://rugutis.wordpress.com/2013/01/26/on-the-origins-and-relationships-between-bread-and-beer/
https://en.wikipedia.org/wiki/Louis_Pasteur
https://en.wikipedia.org/wiki/Lactic_acid_fermentation#Applications
http://www.historyofbread.com/bread-history/history-of-bakers-yeast/
http://www.breadshapes.com/shapes–symbols.html