Richards, Henry Erle, authors
Clarendon Press , 1915
Buku Teks
Eric A. Posner
Ashgate/Dartmouth, 2001
Buku Teks
RPMM-UI, 1985
Buku Teks
Anthony, Martin, author
Society for Industrial and Applied Mathematics, 2001
eBooks
Kesari, U.P.D
Central Law Publication, 2008
Buku Teks