Robinson, Henry Morton
Simon and Schuster, 1950
Buku Teks
Schoenberg, I.J., author
Society for Industrial and Applied Mathematics, 1993
eBooks
May, J. Lewis
Geoffrey Bles, 1946
Buku Teks
Yudi Santoso, author
Pustaka Promethea, 2001
Buku Teks
Bienkowski, Andrew, author
Pocket Books, 2009
Buku Teks