I tried to provide you with the original article but you have blocked me form being able to start a "conversation" with you. This haven't happened before. If you wish to retain complete anonymity & yet have me provide the paper whence came the definition, simply send from any free email provider like yahoo an message to [email protected] indicating that this is you and you would like the article.
I found the links that I was looking for, so....
no problem.
'mud