This map shows the geographic impact of G. Extra'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 G. Extra with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G. Extra more than expected).
This network shows the impact of papers produced by G. Extra. 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 G. Extra. The network helps show where G. Extra may publish in the future.
Co-authorship network of co-authors of G. Extra
This figure shows the co-authorship network connecting the top 25 collaborators of G. Extra.
A scholar is included among the top collaborators of G. Extra 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 G. Extra. G. Extra is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Extra, G. & K. Yağmur. (2013). Interventions. ePrints Soton (University of Southampton). 5(1). 115–153.1 indexed citations
Extra, G., Massimiliano Spotti, & Piet Van Avermaet. (2009). Language testing, migration and citizenship: Cross-national perspectives. Ghent University Academic Bibliography (Ghent University).19 indexed citations
4.
Extra, G., Massimiliano Spotti, & Piet Van Avermaet. (2009). Language testing, migration and citizenship : cross-national perspectives on integration regimes. Data Archiving and Networked Services (DANS).68 indexed citations
5.
Extra, G., Massimiliano Spotti, & Piet Van Avermaet. (2009). Testing regimes for newcomers to the Netherlands. Data Archiving and Networked Services (DANS). 125–147.6 indexed citations
6.
Extra, G. & Massimiliano Spotti. (2009). Language, migration and citizenship : A case study on testing regimes in the Netherlands. Data Archiving and Networked Services (DANS). 61–82.3 indexed citations
7.
Extra, G.. (2005). Omgang met diversiteit : Focus op meertaligheid. Research portal (Tilburg University). 64. 14–17.1 indexed citations
8.
Extra, G. & K. Yağmur. (2004). Meertaligheid in multicultureel Europa: de status van immigrantentalen thuis en op school. Data Archiving and Networked Services (DANS). 5(1). 13–18.3 indexed citations
Broeder, Peter, et al.. (2004). Language policy implementation and language vitality in Western Cape primary schools. Data Archiving and Networked Services (DANS).12 indexed citations
11.
Extra, G., et al.. (2002). De andere talen van Nederland thuis en op school. Data Archiving and Networked Services (DANS).24 indexed citations
12.
Extra, G. & Durk Gorter. (2001). The Other Languages of Europe(Demographic, Sociolinguistic and Educational Perspectives). Data Archiving and Networked Services (DANS).60 indexed citations
Broeder, Peter & G. Extra. (1997). Minority groups and minority languages in the Netherlands : Empirical facts and educational policy. Data Archiving and Networked Services (DANS). 157–179.3 indexed citations
15.
Extra, G. & J.J. de Ruiter. (1994). The sociolinguistic status of the Moroccan Community in the Netherlands. Data Archiving and Networked Services (DANS). 20. 151–176.2 indexed citations
16.
Broeder, Peter, G. Extra, & Roeland van Hout. (1993). Richness and variety in the developing lexicon. Data Archiving and Networked Services (DANS). 145–163.15 indexed citations
17.
Broeder, Peter, G. Extra, & Roeland van Hout. (1987). Measuring lexical richness and variety in second language use. Data Archiving and Networked Services (DANS). 8(1). 1–16.12 indexed citations
18.
Extra, G., et al.. (1985). Bias in intelligentie-onderzoek bij allochtone kinderen. Pedagogische Studiën. 62(9). 392–395.1 indexed citations
19.
Extra, G., et al.. (1983). Turkish children's process of learning to read Dutch as a second language. Data Archiving and Networked Services (DANS). 7(1). 37–53.2 indexed citations
20.
Extra, G., et al.. (1977). Handboek voor de toegepaste taalkunde : het leren en onderwijzen van moderne vreemde talen.1 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.