Look at this thread first:
http://www.linuxquestions.org/questi...system-614764/
Now you could ask Google Books :
http://books.google.com/
and type :
uxfs
in the search field.
The first link I founded that way pointed me to a book called:
"UNIX Filesystems: Evolution, Design, and Implementation" by Steve D. Pete
and yes, there seems to be a chapter about uxfs in it.
Don't they teach you how-to search for information at school
Furthermore, I'm not sure this forum be appropriate for such questions.
HTH, anyway.