Condition of use
----------------
Please see the included file COPYRIGHTS for per-file details on licenses
as well as copyrights and more specifically the file COPYRIGHTS in the inst
directory.

stkpp is publicly available under the LGPL license (see www.gnu.org/copyleft/lgpl.html)

rtkpp (the stkpp integration into R) is publicly available under the GPL
license version 2 or higher (see www.gnu.org/copyleft/gpl.html)

Some part of the Rcpp package have been adapted to the rtkpp pacakge. 
Rcpp is publicly available under the GPL license version 2 or higher.