Sub Articulo 28.0

\begin{verbatim}
+-----------------------------------------+
|                     +-----------------+ |
|   texts ........    |                 | |
|  ...............    |   Fig. 1        | |
|  ...............    |                 | |
|  ...............    +-----------------+ |
|  ...............    texts .........     |
|    .............    ...............     |
|  ...............    ...............     |
|  ...............    ............        |
|                                         |
| +------------------------------------+  +
| |                                    |  |
| |                                    |  |
| |                                    |  |
| |        Fig. 2                      |  |
| |                                    |  |
| +------------------------------------+  +
+-----------------------------------------+
\end{verbatim}
This is not possible. twocolumn know how to handle wide 
figures using figure* environment, but they are always
placed on the top of your page.