<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV><SPAN></SPAN></DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Thanks in advance.<BR></DIV><BR><BR><DIV> <P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">José M. Sancho</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">Professor of Structural Analysis</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">Universidad Politecnica de Madrid</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">ETS de Arquitectura</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">Avda. Juan de Herrera,4</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">28040 Madrid, Spain</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">Tel. +34 91 336 65 16</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">Fax. +34 91 336 65 67</FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT class="Apple-style-span" color="#006312">E-mail: <A href="mailto:jose.sancho@upm.es">jose.sancho@upm.es</A></FONT></P><P style="margin: 0.0px 0.0px 0.0px 20.0px"><BR class="khtml-block-placeholder"></P> </DIV><BR></BODY></HTML>