Radar chart (English Wikipedia)

Porter, Michael M; Niksiar, Pooya (2018). "Multidimensional mechanics: Performance mapping of natural biological systems using permutated radar charts". PLOS ONE. 13 (9): e0204309. Bibcode:2018PLoSO..1304309P. doi:10.1371/journal.pone.0204309. PMC 6161877. PMID 30265707.
Kolence, Kenneth W. (1973). "The Software Empiricist". ACM SIGMETRICS Performance Evaluation Review. 2 (2): 31–36. doi:10.1145/1113644.1113647. S2CID 18600391. Dr. Philip J. Kiviat suggested at a recent NBS/ACM workshop on performance measurement that a circular graph, using radii as the variable axes might be a useful form. […] I recommend they be called "Kiviat Plots" or "Kiviat Graphs" to recognize his insight as to their importance.

excelcharts.com

"Charting around the clock The Excel Charts Blog". Excelcharts.com. 2008-08-15. Retrieved 2013-09-11.

Cleveland, William; McGill, Robert (1984). "Graphical Perception: Theory, Experimentation, and Application to the Development of Graphical Methods". Journal of the American Statistical Association. 79 (387): 531–554. JSTOR 2288400. Summary of Cleveland's hierarchy

"Polar Charts (Report Builder and SSRS)". Microsoft Developer Network. Retrieved December 17, 2015.

Model Systems Knowledge Translation Center. "Effective Use of Radar Charts" (PDF). Model Systems Knowledge Translation Center.

NIST/SEMATECH (2003). Star Plot in: e-Handbook of Statistical Methods. 6/01/2003 (Date created)

Mayr, Georg von (1877), Die Gesetzmäßigkeit im Gesellschaftsleben (in German), Munich: Oldenbourg, OL 23294909M, p.78. Linien-Diagramme im Kreise: Line charts in circles.

Peltier, Jon (2008-08-14). "Rock Around The Clock - Peltier Tech Blog". Peltiertech.com. Retrieved 2013-09-11.

Kolence, Kenneth W. (1973). "The Software Empiricist". ACM SIGMETRICS Performance Evaluation Review. 2 (2): 31–36. doi:10.1145/1113644.1113647. S2CID 18600391. Dr. Philip J. Kiviat suggested at a recent NBS/ACM workshop on performance measurement that a circular graph, using radii as the variable axes might be a useful form. […] I recommend they be called "Kiviat Plots" or "Kiviat Graphs" to recognize his insight as to their importance.

"Qualitative Comparison". Support Analytics Blog. 11 December 2007. Archived from the original on 2012-04-08.

Michael Friendly (2008). "Milestones in the history of thematic cartography, statistical graphics, and data visualization" Archived 2018-09-26 at the Wayback Machine.
Cleveland, William; McGill, Robert (1984). "Graphical Perception: Theory, Experimentation, and Application to the Development of Graphical Methods". Journal of the American Statistical Association. 79 (387): 531–554. JSTOR 2288400. Summary of Cleveland's hierarchy
Cleveland & McGill 1984 (summarized)
"Qualitative Comparison". Support Analytics Blog. 11 December 2007. Archived from the original on 2012-04-08.