Rafols, I. and Meyer, M. (2010) Diversity and Network Coherence as indicators of interdisciplinarity: case studies in bionanoscience. Scientometrics, DOI 10.1007/s11192-009-0041-y.
[maps interdisciplinary developments in terms of a top-down, category-based perspective (disciplinary diversity) and a bottom-up, paper-based approach (network coherence)]
Download Full Paper

Rafols, I., Porter, A.L. and Leydesdorff, L. (In press, 2010) Overlay Maps of Science: Their Potential Usage in Science Policy and Research Management. Journal of the American Society for Information Science and Technology.
Download Full Paper

Leydesdorff, L. and Rafols, I. (2009) A Global Map of Science Based on the ISI Subject Categories. Journal of the American Society for Information Science and Technology, Vol. 60, No. 2, 348-362.
[uses cross-citations between journals to classify ISI subject categories into broad disciplines and to create a global map of science. Identified by Thomson Reuters’ Essential Science Indicators as a Fast Breaking Paper in the field of Social Sciences in 2009.]
Download Full Paper

Porter, A.L., and Rafols, I. (2009) Is Science Becoming More Interdisciplinary? Measuring and mapping six research fields over time, Scientometrics. DOI: 10.1007/s11192-008-2197-2.
[measures the degree of interdisciplinary citations in six disciplines, over time, using the Integration measure (disciplinary diversity)]
Download Full Paper

Porter, A.L., Roessner, J.D., and Heberger, A.E. (2008) How Interdisciplinary is a Given Body of Research?, Research Evaluation, Vol. 17, No. 4, 273-282.
[discusses our Integration and Specialization measures and applies them, together with other measures (e.g., co-authoring) to samples from 22 Subject Categories]