Fridman, Leonid, editor
Springer, 2011
eBooks
Bocher, Erwan, editor
Springer, 2012
eBooks
edited by Andrew Blowers, Bob Evans
Routledge, 1997
Buku Teks SO
Trident Press, [Date of publication not identified]
Buku Referensi
Ward, Ralph D.
John Wiley & Sons, 1997
Buku Teks SO