This paper presents the Web of Science Core Collection and more particularly the Science Citation Index-Expanded as a biblio-graphic database to obtain bibliometric indicators of scientific activity. An analysis of pediatric publications through Pediatrics cate-gory is performed explaining the different search options which are available in the database as well as a detailed visualization of the possible options that can be made with the results. Among the main functions offered by the Web of Science Core Collection, the «Analyze results» function is a useful tool for the calculation of scientific production indicators, and the function «Create citation report» which is related to citation impact based indicators.

Thomson Reuter distributes its databases through the Web of Knowledge, allowing the search in Web of Science (WOS), Current Contents Connect, Proceedings and Journal Citations Reports. Since the year 2004, the Spanish Foundation for Science and Technology (FECYT) provides the Spanish scientific community, research institutes, universities, and other Spanish R&D institutions with WOK access. This paper presents the process and stages that are involved in finding works in Science Citation Index through the Web of Science according to the different options that the database offers (search, advanced search); citations received by a particular author or work (Cited Reference Search) and impact factor and other bibliometric indicators (total times cited for each journal or 5-year impact factor or immediacy index, among others) of the journals that are part of the coverage of the Social Science Citation Index and Science Citation Index in Journal Citation Reports.

Thomson Reuter distributes its databases through the Web of Knowledge, allowing the search in Web of Science (WOS), Current Contents Connect, Proceedings and Journal Citations Reports. Since the year 2004, the Spanish Foundation for Science and Technology (FECYT) provides the Spanish scientific community, research institutes, Universities, and other Spanish R&D institutions with WOK access. This paper presents the process and stages that are involved in finding works in Science Citation Index through the Web of Science according to the different options that the database offers (search, advanced search); citations received by a particular author or work (Cited Reference Search) and impact factor and other bibliometric indicators (total times cited for each journal or 5-Year Impact Factor or immediacy index, among others) of the journals that are part of the coverage of the Social Science Citation Index and Science Citation Index in Journal Citation Reports.