The Swedish system of innovation: Regional synergies in a knowledge-based economy. - Loet Leydesdorff; Øivind Strand (J. Assoc. Inf. Sci. Technol., 2013)

Synergy cycles in the Norwegian innovation system: The relation between synergy and cycle values. - Inga A. Ivanova; Øivind Strand; Loet Leydesdorff (CoRR, 2014)

Economic and Technological Complexity: A Model Study of Indicators of Knowledge-based Innovation Systems. - Inga A. Ivanova; Øivind Strand; Duncan Kushnir; Loet Leydesdorff (CoRR, 2016)

What is the effect of synergy in international collaboration on regional economies? - Inga A. Ivanova; Øivind Strand; Loet Leydesdorff (CoRR, 2016)

An Eco-Systems Approach to Constructing Economic Complexity Measures: Endogenization of the technological Dimension using Lotka-Volterra equations. - Inga A. Ivanova; Øivind Strand; Loet Leydesdorff (Adv. Complex Syst., 2019)