Help Needed: Understanding Equation No. 3 in an Article

[Suminous]

Sorry if I'm doing this wrong, first time poster.

I would like to find a book or article explaining at least some of the reasoning behind equation no. 3 in this article:

http://arxiv.org/pdf/0709.4593v2

I'm a bit surprised I haven't found what I'm looking for yet. I don't know if I'm just having a major brainfart or what. Some help would be much appreciated.

 

[Altabeh]

Sorry if I'm doing this wrong, first time poster.

I would like to find a book or article explaining at least some of the reasoning behind equation no. 3 in this article:

http://arxiv.org/pdf/0709.4593v2

I'm a bit surprised I haven't found what I'm looking for yet. I don't know if I'm just having a major brainfart or what. Some help would be much appreciated.

You better send an email to the authors and ask them if there is any reference regarding the validity of Eq. 3!

AB