This map shows the geographic impact of Heok Hee Ng'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 Heok Hee Ng with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Heok Hee Ng more than expected).
This network shows the impact of papers produced by Heok Hee Ng. 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 Heok Hee Ng. The network helps show where Heok Hee Ng may publish in the future.
Co-authorship network of co-authors of Heok Hee Ng
This figure shows the co-authorship network connecting the top 25 collaborators of Heok Hee Ng.
A scholar is included among the top collaborators of Heok Hee Ng 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 Heok Hee Ng. Heok Hee Ng is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ng, Heok Hee, Heok Hui Tan, Kelvin K. P. Lim, William B. Ludt, & Prosanta Chakrabarty. (2015). Fishes of the Eastern Johor Strait. The Raffles bulletin of zoology. 2015. 303.6 indexed citations
Edds, David R. & Heok Hee Ng. (2007). Additions to the ichthyofauna of Nepal, with a redescription of Neoeucirrhichthys maydelli (Teleostei: Cobitidae). National University of Singapore.3 indexed citations
12.
Ng, Heok Hee. (2006). A phylogenetic analysis of the Asian catfish family Sisoridae (Teleostei: Siluriformes), and the evolution of epidermal characters in the group.. Deep Blue (University of Michigan).4 indexed citations
Ng, Heok Hee & John S. Sparks. (2003). The ariid catfishes (Teleostei: Siluriformes: Ariidae) of Madagascar, with the description of two new species. Deep Blue (University of Michigan). 735. 1–21.10 indexed citations
15.
Ng, Heok Hee. (2002). Bagrichthys majusculus, a new catfish from Indochina (Teleostei, Bagridae). Folia Zoologica. 51(1). 49–54.1 indexed citations
16.
Ng, Heok Hee & Walter J. Rainboth. (2001). A review of the sisorid catfish genus Oreoglanis (Siluriformes: Sisoridae) with descriptions of four new species. Deep Blue (University of Michigan). 732. 1–34.19 indexed citations
17.
Ng, Heok Hee. (2000). Bagrichthys vaillantii (Popta, 1906), a valid species of bagrid catfish from eastern Borneo (Teleostei: Siluriformes). Data Archiving and Networked Services (DANS). 327–332.2 indexed citations
18.
Ng, Heok Hee. (1999). Bagrichthys obscurus, a new species of bagrid catfish from Indochina (Teleostei: Bagridae). SHILAP Revista de lepidopterología.2 indexed citations
19.
Ng, Heok Hee & Ike Rachmatika. (1999). THE CATFISHES (TELEOSTEI: SILURIFORMES) OF BENTUANG KARIMUN NATIONAL PARK, WEST KALIMANTAN, INDONESIA. The Raffles bulletin of zoology. 47. 167–183.10 indexed citations
20.
Ng, Heok Hee & Walter J. Rainboth. (1999). THE BAGRID CATFISH GENUS HEMIBAGRUS (TELEOSTEI: SILURIFORMES) IN CENTRAL INDOCHINA WITH A NEW SPECIES FROM THE MEKONG RIVER. The Raffles bulletin of zoology. 47. 555–576.21 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.