"\ref" in math environment

[beroal]

I want to use \ref in comments on equations inside \begin{align} ... \end{align}. It seems that "pandoc" does not process it even if I enclose \ref in \text{...}.

Without \text:

[WARNING] Could not convert TeX math '\begin{aligned}
      10 &= 1\times 10 +0\times 3, \label{0}
      \\ 3 &= 0\times 10 +1\times 3, \label{1}
      \\ 1 &= 1\times 10 -3\times 3. & \# (\ref{0}) - 3\times (\ref{1}) \nonumber\end{aligned}', rendering as TeX:
   -3\times 3. & \# (\ref{0}) - 3\times (\
                     ^
  unexpected "\\"
  expecting "&", "\\\\", white space or "\\end"

With \text:

[WARNING] Could not convert TeX math '\begin{aligned}
      10 &= 1\times 10 +0\times 3, \label{0}
      \\ 3 &= 0\times 10 +1\times 3, \label{1}
      \\ 1 &= 1\times 10 -3\times 3. & \# \text{(\ref{0})} - 3\times \text{(\ref{1})} \nonumber\end{aligned}', rendering as TeX:
  0 -3\times 3. & \# \text{(\ref{0})} - 3\
                     ^
  unexpected "\\"
  expecting "&", "\\\\", white space or "\\end"

Is it possible to implement this?

[jgm]

It would not be hard to change texmath so that it returns a placeholder of some kind, like a question mark. But to get real references would require a reference+label system which pandoc doesn't yet have.