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Leydesdorff, L. and Lawton Smith, Helen (2022) Triple, quadruple, and higher-order helices: historical phenomena and (neo-)evolutionary models. Triple Helix , pp. 1-31. ISSN 2197-1927. (In Press)

Lawton-Smith, Helen and Leydesdorff, L. (2014) The Triple Helix in the context of global change: dynamics and challenges. Prometheus 32 (4), pp. 321-336. ISSN 0810-9028.