Awesome! Thanks for sharing. I keep the majority of my references in my reference manager but I can see this being really helpful when I'm finishing up a paper and I want to quickly track down a few additional references I don't have handy.
If you use org-mode, this is just one feature of an awesome full-blown bibliography management package called org-ref by John Kitchen (available on melpa or github). Exportation to LaTeX is just a couple of key strokes away. Check out its features from this short youtube video! https://www.youtube.com/watch?v=2t925KRBbFc
Org-ref is one of the most beautiful things that happened to the org-mode ecosystem IMO. It’s truly second to none in ease of use. Couple that with Helm fuzzy searching and any pdf/bibtex reference is a keystroke away. Absolutely worth a try!