2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162683The instances of templates in Wikipedia form an interesting data set of structured information. Here I focus on the cite journal template that is primarily used for citation to articles in scientific journals. These citations can be extracted and analyzed: Non-negative matrix factorization is performed on a (article x journal) matrix resulting in a soft clustering of Wikipedia articles and scientific journals, each cluster more or less representing a scientific topic.7 pages; 2 figures, Wikimania 2008; Corrected typosDigital LibrariesNeural and Evolutionary ComputingG.1.10; G.2.3; H.2.8text