This map shows the geographic impact of Alan Johnston'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 Alan Johnston with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Alan Johnston more than expected).
This network shows the impact of papers produced by Alan Johnston. 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 Alan Johnston. The network helps show where Alan Johnston may publish in the future.
Co-authorship network of co-authors of Alan Johnston
This figure shows the co-authorship network connecting the top 25 collaborators of Alan Johnston.
A scholar is included among the top collaborators of Alan Johnston 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 Alan Johnston. Alan Johnston is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Johnston, Alan. (2010). SIP APIs for Communications on the Web.2 indexed citations
9.
Wing, Dan, et al.. (2008). Secure Media Recording and Transcoding with the Session Initiation Protocol.3 indexed citations
10.
Johnston, Alan, et al.. (2006). Internet Communications Using SIP: Delivering VoIP and Multimedia Services with Session Initiation Protocol (Networking Council). John Wiley & Sons, Inc. eBooks.9 indexed citations
11.
Johnston, Alan, et al.. (2006). Understanding Voice over Ip Security (Artech House Telecommunications Library).8 indexed citations
12.
Johnston, Alan, et al.. (2006). Session Initiation Protocol (SIP) Call Control - Conferencing for User Agents Status of This Memo This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements. Distribution of this memo is unlimited..1 indexed citations
13.
Johnston, Alan, et al.. (2006). Internet Communications Using SIP: Delivering VoIP and Multimedia Services with Session Initiation Protocol. Medical Entomology and Zoology.48 indexed citations
14.
Johnston, Alan, et al.. (2006). SIP, P2P, and Internet Communications.10 indexed citations
15.
Johnston, Alan. (2003). SIP: Understanding the Session Initiation Protocol, Second Edition.15 indexed citations
16.
Johnston, Alan. (2001). SIP: Understanding the Session Initiation Protocol. CERN Document Server (European Organization for Nuclear Research).102 indexed citations
17.
Johnston, Alan, et al.. (2001). Internet Communications Using SIP.20 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.