Subject: Re: Two philosophical questions about inheritance and objects.
From: (Rob Warnock)
Date: 9 Feb 2001 11:04:17 GMT
Newsgroups: comp.lang.lisp
Message-ID: <960irh$2tpj0$>
Russell Senior  <> wrote:
| Check out a paper by Giuseppe Castagna titled: ``Covariance and
| contravariance: conflict without a cause''.  It is available online
| somewhere...

<URL:> lists his papers,
including that one:

    G. Castagna. "Covariance and contravariance: conflict
    without a cause." ACM TOPLAS 17(3):431-447, March 1995. 
    Abstract: <URL:>
    PostScript: <URL:>


Rob Warnock, 31-2-510
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