This map shows the geographic impact of P. Lüdders'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 P. Lüdders with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites P. Lüdders more than expected).
This network shows the impact of papers produced by P. Lüdders. 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 P. Lüdders. The network helps show where P. Lüdders may publish in the future.
Co-authorship network of co-authors of P. Lüdders
This figure shows the co-authorship network connecting the top 25 collaborators of P. Lüdders.
A scholar is included among the top collaborators of P. Lüdders 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 P. Lüdders. P. Lüdders is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ebert, G., et al.. (2000). Emergence and early seedling growth of Tamarindus indica L. from geographically diverse populations in the Sudan.. 74. 17–20.5 indexed citations
6.
Lüdders, P., et al.. (2000). Efecto de la salinidad por cloruro de sodio sobre el balance de nutrientes en plantas de lulo (Solanum quitoense L.). SHILAP Revista de lepidopterología.4 indexed citations
Ebert, G., et al.. (1999). Tamarind (Tamarindus indica L.): a review on a multipurpose tree with promising future in the Sudan. 73. 202–205.24 indexed citations
9.
Schmutz, Ulrich & P. Lüdders. (1998). Effect of NaCl salinity and different root zone temperatures on growth and mineral composition of two mango rootstocks (Mangifera indica L.). Pure (Coventry University). 72. 131–135.7 indexed citations
10.
Fischer, Gerhard & P. Lüdders. (1997). Cambio de los carbohidratos en el fruto de la uchuva (physalis peruviana l.) durante su desarrollo en relación al cáliz y las hojas. Repositorio Institucional UN - Biblioteca Digital.2 indexed citations
11.
Lüdders, P., et al.. (1997). Growing carob (Ceratonia siliqua L.) in Portugal - new perspectives for an old crop.. 39(1). 15–20.
12.
Lüdders, P., et al.. (1995). Flowering, fruit set, and genotype compatibility in cashew.. 69. 215–220.6 indexed citations
Lüdders, P., et al.. (1990). Influence of the nutritional status of the stock plant on rooting of mango cuttings (Mangifera indica L.).. 55(5). 213–216.1 indexed citations
16.
Fischer, Gerhard, et al.. (1990). Physalis peruviana L. - cultivation and research in Colombia.. 32(8). 229–232.1 indexed citations
17.
Lüdders, P., et al.. (1990). Influence of seasonally different sodium treatment on mineral content in leaves of apple trees.. 64. 237–246.1 indexed citations
18.
Lüdders, P., et al.. (1970). Effect of the time of application of urea sprays on apple trees. IV. Reproductive growth.. 125. 144–155.1 indexed citations
19.
Lüdders, P., et al.. (1970). Calcium uptake and "calcium deficiency disorders" of plants under the influence of other nutrients.. 36(4). 285–291.1 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.