Alan L. Porter

Visualization of Disciplinary Profiles: Enhanced Science Overlay Maps

Ismael Rafols, Stephen Carley, Loet Leydesdorff, 2017, J. Data Inf. Sci..

Is science becoming more interdisciplinary? Measuring and mapping six research fields over time

Ismael Rafols, Alan L. Porter, A. Porter, 2009, Scientometrics.