What you need on Sunday evening when you’re looking for a specific file in your “Papers” directory:
alias bibfind="bibtex-ls ~/org/references.bib \
| fzf --multi --ansi \
| rg -o --color never '[a-z0-9\-]+$' \
| xargs -I % sh -c 'fdfind % ~/Documents/papers' \
| xargs -I % sh -c 'xdg-open %'"
Note that this requires fzf-bibtex, rg and fd, but the later two can easily be replaced with the standard ̀grep and find tools.