[O] how to insert a ref to an latex equation in an org file (reftex-reference?)

[Uwe Brauer]

Hi 

Consider 

* Equations with labels

Consider the following 
\begin{equation}
\label{eq:ref-problem:1}
\int f dx=0
\end{equation}

As \ref{eq:ref-problem:1}

Is there any org command which is roughly equivalent to reftex-reference
for latex equations?