title: LaTeX multiple equation references in one
body: <p>Is it possible to combine multiple equation references into one, like it is for the \cite command? What I would like is the following:</p>
  
  <pre><code>\begin{subequations}
   \begin{align}
    a &amp; = b \label{eq1} \\
    c &amp; = d \label{eq2}
   \end{align}
  \end{subequations}
  
  Some text referring to the formulas \eqref{eq1,eq2}.
  </code></pre>
  
  <p>which would then compile as "Some text referring to the formulas (1a,b)." Obviously, this example doesn't work, but I'm hoping there's a package out there that does something similar. Any ideas?</p>