[ExI] PSI, PSI*, and Psi

[scerir]

A. Elitzur wrote more than one deep review about TI and related
stuff, like IFM, time, block universe and indeterminism, etc.. 
Very interesting. I'd suggest to start from the first link.
http://a-c-elitzur.co.il/uploads/articlesdocs/Elitzur-Dolev13.pdf
http://a-c-elitzur.co.il/uploads/articlesdocs/Becoming7-mod.pdf
http://a-c-elitzur.co.il/uploads/articlesdocs/MultipleIFM.pdf
http://a-c-elitzur.co.il/uploads/articlesdocs/More%20to%20T.pdf
http://www.springerlink.com/content/k0xk5213r57283m6/fulltext.pdf