Coba jelasin Daftar pustaka dari Tulang Ishango dong

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Bogoshi, J., Naidoo, K. and Webb, J.: "The oldest mathematical artifact", Math. Gazette, 71:458 (1987) 294.

V. Pletser, D. Huylebrouck, "Contradictions and narrowness of views in "The fables of Ishango, or the irresistible temptation of mathematical fiction", answers and updates", [3]