  The purpose of this short note is to guide a reader to a reliable reference
for the following result of S. Parsa: For any $k,l\ge2$ there exist simplicial
complexes $K, L$ of dimensions $k,l$ such that $K$ does not embed into $\mathbb
R^{2k}$, and $L$ does not embed into $\mathbb R^{2l}$, but the join $K*L$
embeds into $\mathbb R^{2(k+l+1)}$.
