Presentation “On the total vertex irregularity strength of disconnected graphs” on workshop GraphMasters at Institut Teknologi Bandung.
Seminar Combinatorics, Graph Theory and Applications di Universitat Politecnica de Catalunya, Barcelona – Spain on Thursday 10 Desember 2009. Link: https://www-ma4.upc.edu/~oserra/seminari/combgrafseminar2009_10.html
Seminar at Universitat de Lleida – Spain on Wednesday 9 December 2009. Link: http://eps.blogs.udl.cat/2009/12/03/conferncia-classification-of-construction-techniques-of-large-directed-graphs/