Wouter Spekkink article on Industrial Symbiosis as a social process is available on research gate

The article can be found here: https://www.researchgate.net/publication/320493497_Industrial_symbiosis_as_a_social_process_Developing_theory_and_methods_for_the_longitudinal_investigation_of_social_dynamics_in_the_emergence_and_development_of_industrial_symbiosis