no comment

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/qca@31 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
no comment

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/qca@32 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updated citations and included web links in reference section.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/qca@33 edb9625f-4e0d-4859-8d74-9fd3b1da38cb