The Journal of the Brazilian Computer society has published a new issue dedicated to software reuse with  interesting papers on Software Product Lines; the papers can be downloaded here .

This info came from World of Reuse wich is a blog associated with a Brazilian company called RiSE (Reuse in Software Engineering).

You should also check the open source book (creative commons) on "Component Reuse in Software Engineering": C.R.U.I.S.E

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