diff --git a/data/conferencias.yml b/data/conferencias.yml
index 402db05..8c9e4ab 100644
--- a/data/conferencias.yml
+++ b/data/conferencias.yml
@@ -138,23 +138,13 @@
       web: http://conteudo.icmc.usp.br/pessoas/smania/
 - categoria: Cursos
   charlas:
-  - titulo: Algorithmic graph theory
-    abstract: |
-      Intersection graphs: interval graphs, chordal graphs, circular-arc graphs, circle graphs, permutation graphs.
-      Characterizations and algorithms for combinatorial optimization problems on these classes.
-      Graph decompositions: modular decomposition, cliquewidth, treewidth, pathwidth, thinness, clique-cutsets, claw-free graphs decompositions.
-      Algorithms based on decompositions.
-      Graph classes defined by forbidden induced subgraphs: structural properties and algorithmical applications.
-      Bibliography:
-        - Brandstadt A., Bang Le V. and Spinrad J., Graph classes: A survey, SIAM, 1999. 
-        - Golumbic M.C., Algorithmic graph theory and perfect graphs, Annals of Discrete Mathematics, Vol 57, 2004.
-        - McKee T. and McMorris F., Topics in intersection graph theory, SIAM, 1999.
-      Recent and classical papers.
+  - titulo: '' 
+    abstract: '' 
     pdf: ''
     speaker:
-      nombre: Flavia Bonomo
-      afiliacion: Universidad de Buenos Aires
-      web: https://staff.dc.uba.ar/fbonomo/
+      nombre: Roberto Imbuzeiro
+      afiliacion: IMPA
+      web: https://impa.br/page-pessoas/roberto-imbuzeiro-oliveira/ 
   - titulo: ''
     abstract: ''
     pdf: ''