[Haskell-cafe] OT: Paper on increasing entropy in software systems

[Matthew Brecknell]

> > I was just listening to Brooks' talk at OOPSLA 2007 and in the Q&A part
> > at the end he mentions a paper on increasing entropy in software
> > systems.  He mentions the authors' names but I can't quite make it out
> > and Google hasn't been very helpful either.  He says the paper “must be
> > 30 years old” and it sounds like he says it's by Les Bellati and Manny
> > Leimann (Lehmann?).
> 
> Wikipedia's entry for "Software entropy" lists this:
> 
>   Lehman M.M. and Belady L. (1985). Program Evolution. Process of
>   Software Change.
> 
> No link, though.

http://www.amazon.com/exec/obidos/ASIN/0124424406

Using the author names provided by Ketil, scholar.google.com also finds
this:

http://www.research.ibm.com/journal/sj/153/ibmsj1503E.pdf