|linkedin = [http://br.linkedin.com/pub/ant%C3%B4nio-celso-guimaraes-teixeira/21/628/a95 Antonio Guimaraes]
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'''Antônio (Celso) Guimaraes (Teixeira)''' is an Engineer at [[ANANTEL]].
'''Antônio (Celso) Guimaraes (Teixeira)''' is an Engineer at [[ANANTEL]].
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He attended ICTs and Climate Change side event 2.<ref>[http://www.flickr.com/photos/malcolm_johnson/2980164819/ flickr.com]</ref><ref>[http://www.itu.int/ITU-T/wtsa-08/se/climatechange/index.html itu.int]</ref>