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Buku Teks
edited by M.L. Balinski, C. Lemarechal
North-Holland, 1978
Buku Teks
Mc Millan, Claude
John Wiley & Sons, 1975
Buku Teks
Zoutendijk, G.
North-Holland Publ, 1976
Buku Teks
edited by T.C. Hu, Stephen M. Robinson
Academic Press , 1973
Buku Teks