Comparison System V - 4BSD (a request)

[philst at hirst1.UUCP]

I am looking for a paper comparing UNIX SYSTEM V with BSD 4.1 and 4.2.

I heard about the existence of such a paper, but I am unable to find it.
Could someone mail me the reference.  

Michel Lacroix, Philips Research Lab Brussels.
		...!philabs!prlb2!lacroix