Armadillo itself carries the following in file NOTICE.TXT:

  Armadillo C++ Linear Algebra Library
  Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
  Copyright 2008-2016 National ICT Australia (NICTA)

  This product includes software developed by Conrad Sanderson (http://conradsanderson.id.au)
  This product includes software developed at National ICT Australia (NICTA)


The RcppArmadillo package integrates Armadillo into R, provides wrappers,
converters, a test framework, examples and more. It was written by Dirk
Eddelbuettel, Romain Francois and Doug Bates with contributions by many
others as detailed in the ChangeLog file.