This map shows the geographic impact of R. Luyken'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 R. Luyken with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R. Luyken more than expected).
This network shows the impact of papers produced by R. Luyken. 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 R. Luyken. The network helps show where R. Luyken may publish in the future.
Co-authorship network of co-authors of R. Luyken
This figure shows the co-authorship network connecting the top 25 collaborators of R. Luyken.
A scholar is included among the top collaborators of R. Luyken 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 R. Luyken. R. Luyken is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Luyken, R., et al.. (1967). Skeletbouw en lichaamsgewicht : een statistisch-somametrisch onderzoek bij 8- tot 25-jarige jongens en mannen. Nederlandsch tijdschrift voor geneeskunde/Nederlands tijdschrift voor geneeskunde/NTvG-databank. 111(10). 441.
Luyken, R.. (1963). [Protein problems in New Guinea].. PubMed. 32. 191–7.1 indexed citations
6.
Nugteren, D.H., et al.. (1962). The nutritional condition of the Kapaukus in the Central Highlands of Netherlands New Guinea.. PubMed. 14. 27–32.7 indexed citations
7.
Luyken, R., et al.. (1961). Studies on the physiology of nutrition in Surinam. IX. Somatomerical data.. PubMed. 13. 123–30.6 indexed citations
8.
Luyken, R., et al.. (1961). Studies on the physiology of nutrition in Surinam. VII. Metabolism of calcium.. PubMed. 13. 46–54.2 indexed citations
9.
Luyken, R. & A. A. J. Jansen. (1960). The cholesterol level in the blood serum of some population groups in New-Guinea.. PubMed. 12. 145–8.11 indexed citations
10.
Jansen, A. A. J., et al.. (1960). Quantity and composition of breast milk in Biak Island (Neth. New Guinea).. PubMed. 12. 138–44.8 indexed citations
11.
Luyken, R., et al.. (1960). Studies on the physiology of nutrition in Surinam. II. Serum protein levels.. PubMed. 12. 233–6.3 indexed citations
12.
Luyken, R., et al.. (1960). Studies on the physiology of nutrition in Surinam. III. Urea excretion.. PubMed. 12. 237–42.6 indexed citations
13.
Luyken, R., et al.. (1960). Studies on the physiology of nutrition in Surinam. IV. Nitrogen balance studies.. PubMed. 12. 303–7.2 indexed citations
14.
Luyken, R., et al.. (1960). Studies on the physiology of nutrition in Surinam. VI. Cholesterol content of the blood serum.. PubMed. 12. 313–4.4 indexed citations
15.
Luyken, R., et al.. (1960). Studies on the Physiology of Nutrition in Surinam. I. General Remarks.. 12(3).3 indexed citations
16.
Luyken, R., et al.. (1959). Nutrition research on the Windward Islands (Netherlands Antilles). II. Medical examination of population.. PubMed. 11. 103–14.1 indexed citations
17.
Luyken, R., et al.. (1958). Observations on serum proteins of inhabitants of New Guinea and the Antilles, compared with animal experiments.. PubMed. 10(4). 385–91.1 indexed citations
18.
Luyken, R., et al.. (1957). The serum proteins of malaria-free inhabitants of Central Netherlands New-Guinea.. PubMed. 9(1). 1–8.5 indexed citations
19.
Luyken, R., et al.. (1956). Nutrition and nutritional status of urban and rural Papuans in Netherlands New-Guinea.. PubMed. 8(1). 45–54.1 indexed citations
20.
Luyken, R., et al.. (1955). Nutritional state of the Marind-anim tribe in South New Guinea.. PubMed. 7(4). 315–39.6 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.