I am looking for 2 fonts.

First - a font used for core text (pic rel.).
Second - a font of derivations (pic rel.).

Both fonts look like a default font from LaTeX, yet those in picture look way thinner with wider spacing between letters.

Here I attach 2 more references:
* https://www.rogerfrigola.com/doc/rcc_control.pdf
* https://www.rogerfrigola.com/doc/researchtalk042012.pdf

Thank anyone in advance)