A set of tools to extract bibliographic content from 'PubMed' database using 'NCBI' REST API < https://www.ncbi.nlm.nih.gov/home/develop/api/>. It includes functions to search, download, and convert 'PubMed' bibliographic records into data frames compatible with the 'bibliometrix' package. Features include programmatic query building, batch downloading by PMID, citation enrichment via 'NCBI' E-Link, and robust error handling with automatic retry logic.