All files in src/external are taken from 
(i) ‘lpsolve’ (https://cran.r-project.org/src/contrib/Archive/lpSolveAPI) version 5.5.2.0, 
(ii) ‘bnmin1’ (https://www.mrao.cam.ac.uk/~bn204/oof/bnmin1.html) version 1.11

All files in inst/tools/r-stripper are taken from ‘r-stripper’ (https://github.com/dcdillon/r-stripper).

Copyrights and modification details are explicitly described at the beginning of each of those files.

