Interesting information found here.
Also:
1. http://members.aol.com/RSIGRACE/neo1.html
2. http://www.etsjets.org/jets/journal/42/42-2/42-2-pp271-291_JETS.pdf
Also:
1. http://members.aol.com/RSIGRACE/neo1.html
2. http://www.etsjets.org/jets/journal/42/42-2/42-2-pp271-291_JETS.pdf