| X-Ray Spectrometry | Wiley Journals | John Wiley and Sons | Spectroscopy | 1997 | Current | 
          
                                                                                        | Xenobiotica | Taylor and Francis Journals | Taylor and Francis | Health, Toxicology and Mutagenesis; Pharmacology; Toxicology; Biochemistry; General Medicine | 1997 | current | 
          
                                                                                        | Xenotransplantation (Electronic) | Wiley Journals | International Xenotransplantation Association | Transplantation; Immunology | 1997 | Current | 
          
                                                                                        | XI Brazilian Power Electronics Conference | IEL Online | IEEE | Power, Energy and Industry Applications | 2011-11-21 |  | 
          
                                                                                        | XII Brazilian Symposium on Computer Graphics and Image Processing (Cat. No.PR00481) | IEL Online | IEEE | Computing and Processing | 1988-01-01 |  | 
          
                                                                                        | XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) | IEL Online | IEEE | Computing and Processing | 1988-01-01 |  | 
          
                                                                                        | XVIII Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI'05) | IEL Online | IEEE | Computing and Processing | 2006-02-27 |  | 
          
                                                                                        | XX Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2007) | IEL Online | IEEE | Computing and Processing | 2007-10-29 |  | 
          
                                                                                        | XXII Annual Pacific Voice Conference (PVC) | IEL Online | IEEE | Bioengineering | 2014-06-30 |  | 
          
                                                                                        | XXII International Symposium on Information, Communication and Automation Technologies, ICAT | IEL Online | IEEE | Communication, Networking and Broadcast Technologies | 2009 |  | 
          
                                                                                        | XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. | IEL Online | IEEE | Engineered Materials, Dielectrics and Plasmas | 2005-04-25 |  | 
          
                                                                                        | XXIV International Conference of the Chilean Computer Science Society | IEL Online | IEEE | Computing and Processing | 2004-12-27 |  | 
          
                                                                                        | XXV International Conference of the Chilean Computer Science Society (SCCC'05) | IEL Online | IEEE | Computing and Processing | 2006-02-06 |  | 
          
                                                                                        | XXVI International Conference of the Chilean Society of Computer Science (SCCC'07) | IEL Online | IEEE | Computing and Processing | 2007-12-06 |  |