$ cat references.txt
* https://learn.kegerator.com/using-a-hydrometer/
* https://learn.kegerator.com/bottling-beer/
* https://learn.kegerator.com/raising-abv/
* https://www.brewersfriend.com/hydrometer-temp/
* https://www.wallingtons.com.au/
* https://www.brewersfriend.com/stats/
* https://www.ibrew.com.au/