For the survival package, you might want to reference appendix E of Therneau
and Grambsh, Modeling Survival Data, Springer-Verlag, 2000. This contains a
set
of small example data sets for which results have been worked out in closed
form. S-plus and R pass all the tests: they are a portion of the test suite of
the package. (SAS does not pass, BTW. It doesn't compute dfbeta residuals for
a Cox model quite right under the Efron approximation. The error is small and
almost certainly unimportant in practical data, but I like to keep it in hand
as
a counterexample to believers of SAS infallability).
Terry Therneau
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