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Fajardo Quesada, A. J.; Hernández González, E. A.; Herrero Pacheco, R.; Beritán Yero, L. V. Chapter 7. Heat Maps: Representing Research Density. In Applied bibliometrics. From data to publication (Spanish Edition); AG Editor, 2025; pp. 109-114. https://doi.org/10.62486/978-9915-9680-6-3.ch07.