A. Gorban, and I. Tyukin. (2018)cite arxiv:1801.03421Comment: Accepted for publication in Philosophical Transactions of the Royal Society A, 2018. Comprises of 17 pages and 4 figures.
M. Cheng, J. Duncan, and J. Harvey. (2012)cite arxiv:1204.2779Comment: 124 pages, 75 tables; updated references and minor editing in v.2; minor editing and two new theorems in v.3.