math mode - ugly \overline on some characters - TeX - LaTeX Stack Exchange
Latex Underline – Telegraph
math mode - pdflatex vs. lualatex: Libertinus and overline vs. bar - TeX - LaTeX Stack Exchange
LaTeX Reference | Terminally Incoherent
stacking symbols - The \bar and \overline commands - TeX - LaTeX Stack Exchange
stacking symbols - The \bar and \overline commands - TeX - LaTeX Stack Exchange
Everything You Forget About LaTeX: \bar vs. \overline
bar and \overbar not centered with unicode-math and Tex Gyre Font - TeX - LaTeX Stack Exchange
stacking symbols - The \bar and \overline commands - TeX - LaTeX Stack Exchange
How do you use bar and overline over characters?
math mode - overline over no text - TeX - LaTeX Stack Exchange
Underbar changing the style of font but \bar not, why? - TeX - LaTeX Stack Exchange
Linear format equations using UnicodeMath and LaTeX in Word - Microsoft Support
Mathematical symbols
math mode - Can I get a \widebar without using the mathabx package? - TeX - LaTeX Stack Exchange
How to place a wide bar over a wide expression? - TeX - LaTeX Stack Exchange
How do you use bar and overline over characters?
LaTeX Symbols
math mode - How to show a wide bar over a letter? - TeX - LaTeX Stack Exchange
Everything You Forget About LaTeX: \bar vs. \overline
accents - overbar with parenthesis - TeX - LaTeX Stack Exchange
math mode - Can I get a \widebar without using the mathabx package? - TeX - LaTeX Stack Exchange
math operators - A simple solution to using widebar on subscripted symbol with small space with the subscript - TeX - LaTeX Stack Exchange
Bar -- from Wolfram MathWorld
