Citations per year, relative to Roderich Ptak Roderich Ptak (= 1×)
peers
Denys Lombard
Countries citing papers authored by Roderich Ptak
Since
Specialization
Citations
This map shows the geographic impact of Roderich Ptak'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 Roderich Ptak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roderich Ptak more than expected).
This network shows the impact of papers produced by Roderich Ptak. 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 Roderich Ptak. The network helps show where Roderich Ptak may publish in the future.
Co-authorship network of co-authors of Roderich Ptak
This figure shows the co-authorship network connecting the top 25 collaborators of Roderich Ptak.
A scholar is included among the top collaborators of Roderich Ptak 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 Roderich Ptak. Roderich Ptak is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ptak, Roderich, et al.. (2010). Marine animals in traditional China : studies in cultural history = Meerestiere im traditionellen China : Studien zur Kulturgeschichte. Harrassowitz eBooks.1 indexed citations
4.
Ptak, Roderich. (2009). THE AVIFAUNA OF MACAU. Monumenta Serica. 57(1). 195–230.1 indexed citations
5.
Ptak, Roderich. (2007). Edward L. Dreyer : Zheng He. China and the Oceans in the Early Ming Dynasty, 1405-14. Archipel. 74(1). 256–260.
Schottenhammer, Angela & Roderich Ptak. (2006). The perception of maritime space in traditional Chinese sources. Ghent University Academic Bibliography (Ghent University).22 indexed citations
8.
Ptak, Roderich, et al.. (2004). Die koreanische Weltkarte in St. Ottilien: ein Beitrag zur Kartographie des Ferdinand Verbiest. 154(1). 201–218.1 indexed citations
9.
Ptak, Roderich. (1998). China and the Asian seas : trade, travel, and visions of the other (1400-1750). Ashgate eBooks.6 indexed citations
10.
Guillot, Claude, Denys Lombard, & Roderich Ptak. (1998). From the Mediterranean to the China Sea : miscellaneous notes. Harrassowitz eBooks.21 indexed citations
11.
Guillot, Claude, Denys Lombard, & Roderich Ptak. (1998). From the Mediterranean to the China Sea.6 indexed citations
12.
Ptak, Roderich, et al.. (1997). China and her neighbours : borders, visions of the other, foreign policy 10th to 19th century. Harrassowitz eBooks.9 indexed citations
13.
Ptak, Roderich. (1995). Images of Maritime Asia in Two Yuan Texts: Daoyi zhilue and Yiyu zhi.8 indexed citations
14.
Ptak, Roderich, et al.. (1994). Maritime Asia : profit maximisation, ethics and trade structure c. 1300-1800.4 indexed citations
15.
Ptak, Roderich & Dietmar Rothermund. (1991). Emporia, commodities and entrepreneurs in Asian maritime trade, c. 1400-1750. F. Steiner eBooks.41 indexed citations
Ptak, Roderich. (1984). Über Wang Ching-hungs und Hou Hsiens Teilnahme an Cheng Hos Expeditionen.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.