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On the development and application of a self–organizing feature map–based patent map[J] . Byung–UnYoon,Chang–ByungYoon,Yong–TaePark.R&D Management . 2002 (4)
[9]
On the development and application of a self–organizing feature map–based patent map[J] . Byung–UnYoon,Chang–ByungYoon,Yong–TaePark.R&D Management . 2002 (4)