C. Shao, L. Wang, L. Xiao, and J. Wu, “Qualitative phase space reconstruction analysis of supply-chain inventor time series”, S. Afr. J. Sci., vol. 106, no. 11/12, p. 7 pages, Nov. 2010, Accessed: Nov. 22, 2024. [Online]. Available: https://sajs.co.za/article/view/10097