The notion of ‘core documents’, first introduced in the context of co-citation analysis and later re-introduced for bibliographic coupling, refers to the representation of the core of a publication set according to given criteria. In the present study, the notion of core documents is extended to the combination of citation-based and textual links. It is shown that core documents defined this way can be used to represent and describe document clusters and topics at different levels of aggregation. Methodology is illustrated using the example of two ISI Subject Categories selected from applied and social sciences.
Batagelj, V, Mrvar, A 2003 Pajek—analysis and visualization of large networks M Jünger P Mutzel eds. Graph drawing software Springer New York 77–103.
Boyack, KW, Klavans, R 2010 Co-citation analysis, bibliographic coupling, and direct citation: Which citation approach represents the research front most accurately?. Journal of the American Society for Information Science and Technology 61 12 2389–2404 .
Braam, RR, Moed, HF AFJ van Raan 1991 Mapping of science by combined cocitation and word analysis, Part 1: Structural aspects. Journal of the American Society for Information Science 42 4 233–251 .
Braam, RR, Moed, HF AFJ van Raan 1991 Mapping of science by combined cocitation and word analysis, Part II: Dynamical aspects. Journal of the American Society for Information Science 42 4 252–266 .
Glänzel, W, Czerwon, HJ 1996 A new methodological approach to bibliographic coupling and its application to the national, regional and institutional level. Scientometrics 37:195–221 .
Glenisson, P, Glänzel, W, Janssens, F B de Moor 2005 Combining full text and bibliometric information in mapping scientific disciplines. Information Processing & Management 41 6 1548–1572 .
Janssens, F, Zhang, L, Glänzel, W 2009 Hybrid clustering for validation and improvement of subject-classification schemes. Information Processing & Management 45 6 683–702 .
Lamirel, J.C., Ta A.P., & Attik, M. (2008), Novel labeling strategies for hierarchical representation of multidimensional data analysis results. In: A. Gammerman (ed.), Proceedings of the 26th IASTED International Conference on Artificial Intelligence and Applications (Track 595-138, pp. 169–174), 11-13 Feb 2008, Innsbruck, Austria. Anaheim, CA: ACTA Press.
Rousseeuw, PJ 1987 Silhouettes: A graphical aid to the interpretation and validation of cluster analysis. Journal of Computational and Applied Mathematics 20:53–65 .
Sen, SK, Gan, SK 1983 A mathematical extension of the idea of bibliographic coupling and its applications. Annals of Library Science and Documentation 30:78–82.
Small, H 1973 Cocitation in scientific literature—new measure of relationship between 2 documents. JASIS 24 4 265–269 .
Zhang, L, Glänzel, W, Liang, L 2009 Tracing the role of individual journals in a cross-citation network based on different indicators. Scientometrics 81 3 821–838 .
Zitt, M, Bassecoulard, E 1994 Development of a method for detection and trend analysis of research fronts built by lexical or cocitation analysis. Scientometrics 30 1 333–351 .