Artikel Jurnal
Ito, Kiyosi, author
Society for Industrial and Applied Mathematics, 2002
eBooks
Puspita Kencana Sari, author
Fakultas Ilmu Komputer Universitas Indonesia, 2006
UI - Skripsi (Membership)
Embretson, Susan E., author
Lawrence erlbaum assossiate, 2000
Buku Teks
Brown, B. Malcolm, editor
Springer, 2012
eBooks