Does it mean an unlimited number of receivers for the 4 ship formation?
No there is no book. Unfortunately most sources I have aren't in english but german. If you have no problem with that I can give you some links, but as mentioned I can't give you links to every source.
It's important to note that the 8 aircraft can all contribute their data to the network (first receive by a host platform and then distibuted to an unlimited number of receivers) but this transmissions doesn't contain all the information the 8 aircraft can exchange between each other.