If you tell me more about what you're trying to do, I can find exactly what you need: Do you need for a B5 notebook?
It looks like there might be a typo in the name—did you mean ? There is no widely recognized research or technology known as "B57zip."
bzip2 is based on the Burrows-Wheeler Transform (BWT) . The foundational paper for this is "A Block-sorting Lossless Data Compression Algorithm" by Michael Burrows and David Wheeler.
Is "B57zip" a specific internal or a niche project name?