documentation for 'minimal' option of 'sample' command

["Christopher G. Green \(L\)" <cggreen@u.washington.edu>]

Does any one know of a reference that explains the algorithm used for the
'minimal' option to the 'sample' command in S-Plus 7 and higher? The help
page for 'sample' does not give a reference; nor does the source code for
'sample.default'.

Thanks,

Chris Green