1. Mardia, K.V. and Jupp, P.E. (2000). Directional Statistics. John Wiley & Sons, New Jersey, USA.
2. Jammalamadaka, S.R. and SenGupta, A. (2001). Topics in Circular Statistics, vol. 5. World Scientific, Singapore.
3. Fisher, N.I. (1995). Statistical Analysis of Circular Data. Cambridge University Press, Cambridge, UK.
4. Jammalamadaka, S.R., Wainwright, B. and Jin, Q. (2021). Functional clustering on a circle using von Mises mixtures. J. Stat. Theory Pract., 15, 1–17.
5. Dhillon, I.S. and Sra, S. (2003). Modeling data using directional distributions. Technical report, Technical report TR-03-06, Department of Computer Sciences, University of Texas at Austin.