Olsen, Gary
Ohio North Light Books , 1997
Buku Teks SO
Parekh, Ranjan
Tata McGraw-Hill , 2006
Buku Teks SO
Raghavan, S. V.
Prentice-Hall, 1998
Buku Teks SO
Stankovic, Srdjan
Springer-Science, 2012
eBooks
Charles, Curtis B.
John Wiley & Sons, 1996
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