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{\large\bf Title of the paper (will appear in lower case bold type)}\\[0.3cm]

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A.B. FirstAuthor$^1$, \underline{C.D. SecondAuthor$^2$} and E.F.
ThirdAuthor$^1$\\[0.3cm]

{\small $^1$ First Grouped Address}\\
{\small $^2$ Second Grouped Address}\\

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Please fill in the text of your abstract here.
These are instructions which you should delete before sending back this file. Title, as well as authors and their address {\it (author block)}, should be centered. Leave one blank line after title.  Authors: give initials (with punctuation) followed by last name. Names of authors and their addresses should be typed in upper and lower case letters. Please, underline the name of the author who will present the paper. Leave one blank line after the {\it author block}.\\

An abstract should not contain more than 400 words. Do not reduce font
size, or line spacing.\\

\end{tabular}

\vspace{0.5cm}

% Check the appropiate session.

{\bf I want to present this contribution at Session I ( ), II ( ), III ( ), 
IV ( ), V ( ), VI ( ), VII ( ), 
or round table discussion: 1 ( ) or 2 ( ) or 3 ( ) } \\

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