fix broken links (and add a ref suggested by Maarten Moesen

projects.html

@@ -635,12 +635,13 @@ <h2 id="medical">Medical Modeling and Biophysics</h2>
     -->
     <B>Used CGAL packages:</B> 3D convex hull, 3D Delaunay triangulation, 3D alpha shapes <BR><BR>
 
-<LI><A HREF="https://www.mtm.kuleuven.be/Onderzoek/Composites/PhD/2009-maarten-moesen-phd-thesis.pdf"><B>Design and Modeling of Cellular Solids</B></A><BR>
+<LI><A HREF="http://dx.doi.org/10.13140/RG.2.2.13606.54083"><B>Design and Modeling of Cellular Solids</B></A><BR>
     <B>Maarten Moesen, S.V. Lomov, J. Schrooten, H. Van Oosterwyck</B> and <B>I. Verpoest</B><BR>
     Department of Metallurgy and Materials Engineering (MTM), K.U. Leuven, Belgium.<BR>
     - Numerical optimization of bone scaffold geometry based on local strain distributions, Proceedings of the 8th International Symposium on Computer Methods in Biomechanics and Biomedical Engineering (CMBBE 2008), Porto, Portugal, 27 February-1 March 2008<BR>
-    - Bone Scaffold Design Based On Optimization of Local Strain Distributions, Proceedings of the 16th Congress of the European Society of Biomechanics (ESB 2008), Lucerne, Switzerland, 6-9 July 2008<BR>
-    <B>Used CGAL packages:</B>Surface mesher, Polyhedron,
+    - <a href="http://dx.doi.org/10.1016/S0021-9290(08)70450-0">Bone Scaffold Design Based On Optimization of Local Strain Distributions</a>, Proceedings of the 16th Congress of the European Society of Biomechanics (ESB 2008), Lucerne, Switzerland, 6-9 July 2008<BR>
+    - MOESEN, Maarten, CRAEGHS, Tom, KRUTH, Jean-Pierre, et al. <a href="https://doi.org/10.1016/j.cad.2011.03.004">Robust beam compensation for laser-based additive manufacturing</a>. Computer-Aided Design, 2011, vol. 43, no 8, p. 876-888.<BR>
+    <B>Used CGAL packages: </B>Surface mesher, Polyhedron,
     3D Nef Polyhedron, 2D constrained Delaunay Triangulation<BR><BR>
 
 <LI><A HREF="http://femonum.telecom-paristech.fr/"><B> FEMOMUM:</B></A>