R044-001 : safety of machinery: guidance and recommendations for the avoidance of hazards due to static electricity: February 1999 / European Commitee for Electrothecnical Standardization
R064-004 : electrical installations of buildings protection against electromagnetic interferences (EMI) in installations of buildings / European Commitee for Electrothecnical Standardization
Le petit Robert : dictionnaire alphabétique et analogique de la langue française / Paul Robert; [coord.] A. Rey et J. Rey-Deboye
Prontuário ortográfico e guia da língua portuguesa / Magnus Bergstrõm, Neves Reis