Interesting fact that under the hood it's based on tANS introduced by Jarosław Duda from Jagiellonian University:
some cool references:
https://www.youtube.com/watch?v=uXtmN9fE01k
https://th.if.uj.edu.pl/~dudaj/
https://demonstrations.wolfram.com/DataCompressionUsingAsymm...
https://encode.su/threads/2078-List-of-Asymmetric-Numeral-Sy...