Haberman, Richard
Prentice-Hall, 1997
Buku Teks SO
Strang, Gilbert
Wellesley Cambridge Press, 1986
Buku Referensi
Buku Teks
Keyfitz, Nathan
Addison-Wesley, 1968
Buku Teks SO
edited by Murray S. Klamkin
Society for Industrial and Applied Mathematics, 1995
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