https://realpython.com/python-mysql/

https://dev.mysql.com/doc/connector-python/en/preface.html



https://www.geeksforgeeks.org/working-with-pdf-files-in-python/
https://www.geeksforgeeks.org/extract-text-from-pdf-file-using-python/
https://qxf2.com/blog/extracting-data-from-pdfs-python/


https://www.metachris.com/pdfx/
https://softwarerecs.stackexchange.com/questions/76210/software-to-extract-the-list-of-references-and-title-from-a-pdf-of-a-research-pa
https://pypi.org/project/refextract/
https://stackoverflow.com/questions/62365767/extract-references-from-pdf-python
https://discuss.python.org/t/pdf-extraction-with-python-wrappers/40384