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Rafols, I.; Porter, A.L.; Leydesdorff, L.: Science overlay maps : a new tool for research policy and library management (2010) 1.00
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Boer, V. de; Porter, A.L.; Someren, M. v.: Extracting historical time periods from the Web (2010) 1.00
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Kay, L.; Newman, N.; Youtie, J.; Porter, A.L.; Rafols, I.: Patent overlay mapping : visualizing technological distance (2014) 1.00
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