This is the part of the Open Science Foundation that parses citations in various formats.

cat > citation.txt 1. Monty P, Circus F (1969) How Not To Be Seen. Now For Something Completely Different 9: 296–305. doi: 42.1024/c.l.py. ^D citebite citation.txt { ... } 

The output follows the schema defined here: https://github.com/citation-style-language/schema/blob/master/csl-data.json

Grammars for various formats are in the grammars/ subfolder.