For sometime I have used the very useful [MathSciNet MRef tool](https://mathscinet.ams.org/mathscinet/freetools/mref).  It allows one to input a citation (e.g. from zbMath or from MRLookup, if you don't have MathSciNet access, as I didn't for a while, and still don't conveniently when out of the office) and obtain canonically formatted citations in a variety of formats.

I'm not a big user of BiBTeX (maybe I should be) and so I appreciated MRef's ability to output canonically formatted TeX code which I could paste into a manual `thebibliography` environment in LaTeX.  However, since MRef was redesigned, it simply says "TeX format is temporarily unavailable."

> Does anyone have some insider knowledge as to when TeX formatting might return?

> Are there any other (free) tools which do a similar thing?

(I know I should have a better bibliography management system, but as I get older, I discover that time is my limiting factor in many things, and so it's nice to just have a simple system which adequately works, which MRef used to...)