Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
The Pleistocene Changes of Vegetation and Climate in Tropical South America
Countries citing papers authored by T. van der Hammen
Since
Specialization
Citations
This map shows the geographic impact of T. van der Hammen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by T. van der Hammen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. van der Hammen more than expected).
Fields of papers citing papers by T. van der Hammen
This network shows the impact of papers produced by T. van der Hammen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by T. van der Hammen. The network helps show where T. van der Hammen may publish in the future.
Co-authorship network of co-authors of T. van der Hammen
This figure shows the co-authorship network connecting the top 25 collaborators of T. van der Hammen.
A scholar is included among the top collaborators of T. van der Hammen based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with T. van der Hammen. T. van der Hammen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Hammen, T. van der, et al.. (2018). Bases para el plan de manejo ambiental de la cuenca hidrográfica de la laguna de Fúquene. SIE (Muisca Goddess of Water) (University of Cundinamarca).
3.
Hammen, T. van der, et al.. (2009). La ecología y tecnología de los abrigos rocosos en El Abra, Sabana de Bogotá, Colombia. 77–99.3 indexed citations
4.
Hammen, T. van der, et al.. (2006). Análisis facial de alta resolución de sedimentos del holoceno tardío en el Páramo de Frontino, Antioquia, Colombia. SHILAP Revista de lepidopterología.3 indexed citations
5.
Rangel, Orlando, et al.. (2004). Paleoecología de alta resolución del Holoceno tardío en el Páramo de Frontino, Antioquia, Colombia. SHILAP Revista de lepidopterología.10 indexed citations
6.
Hammen, T. van der, et al.. (2003). Un diagrama de polen del Pleistoceno final y Holoceno de Mullumica. SHILAP Revista de lepidopterología.6 indexed citations
Hammen, T. van der, et al.. (1999). Comunidades vegetales y patrones de degradación y sucesión en la vegetación de los cerros occidentales de Chia-Cundinamarca-Colombia. Revista de la Academia Colombiana de Ciencias Exactas Físicas y Naturales. 23(89). 529–554.14 indexed citations
9.
Hammen, T. van der. (1995). El estudio del Pleistoceno y Cuaternario de la Sabana de Bogota - Colombia: Introduccion Historica. UvA-DARE (University of Amsterdam).
Cleef, A.M., et al.. (1995). Estudio palinologico del Pleniglacial medio de la seccion rio Otono-Manizales Enea (Cordillera Central, Colombia). (A palynological study of the Middle Pleniglacial Rio Otono-Manizales Enea section (Central Cordillera, Colombia).. UvA-DARE (University of Amsterdam). 441–451.1 indexed citations
12.
Absy, Μ. L., A.M. Cleef, Marc Fournier, et al.. (1991). Mise en évidence de quatre phases d'ouverture de la forêt dense dans le Sud-Est de l'Amazonie au cours des 60 000 dernières années : première comparaison avec d'autres régions tropicales. 312(6). 673–678.180 indexed citations
13.
Hammen, T. van der, et al.. (1990). Guayabero i: un sitio precerámico de la localidad angostura ii, san josé del guaviare. LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas).7 indexed citations
14.
Hammen, T. van der, et al.. (1988). Cambios ambientales y desarrollo cultural en el bajo rio san jorge. 55–88.25 indexed citations
15.
Hammen, T. van der & D. Burger. (1966). Pollen flora and age of the Takutu Formation (Guyana). Leidse Geologische Mededelingen. 38(1). 173–179.12 indexed citations
16.
Wijmstra, T.A. & T. van der Hammen. (1966). Palynological data on the history of tropical savannas in northern South America. Data Archiving and Networked Services (DANS). 38(1). 71–83.92 indexed citations
17.
Hammen, T. van der, et al.. (1965). The Paleocene pollen flora of Colombia. Leidse Geologische Mededelingen. 35(1). 105–114.43 indexed citations
18.
Hammen, T. van der, et al.. (1965). Late Quaternary glacial and vegetational sequence in Valle de Lagunillas, Sierra Nevada del Cocuy, Colombia. The Digital Academic Repository of Naturalis Biodiversity Center (Naturalis Biodiversity Center). 32(1). 157–182.50 indexed citations
19.
Hammen, T. van der, et al.. (1964). A palynological study on the Tertiary and Upper Cretaceous of British Guiana. Leidse Geologische Mededelingen. 30(1). 183–241.126 indexed citations
20.
Hammen, T. van der. (1963). A palynological study on the Quaternary of British Guiana. Leidse Geologische Mededelingen. 29(1). 125–168.79 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.