Cristelli, M., Gabrielli, A., Tacchella, A., Caldarelli, G., & Pietronero, L. (2013). Measuring the Intangibles: A Metrics for the Economic Complexity of Countries and Products. Public Library of Science.

Cristelli, Matthieu, Andrea Gabrielli, Andrea Tacchella, Guido Caldarelli, و Luciano Pietronero. Measuring the Intangibles: A Metrics for the Economic Complexity of Countries and Products. Public Library of Science, 2013.

Cristelli, Matthieu, et al. Measuring the Intangibles: A Metrics for the Economic Complexity of Countries and Products. Public Library of Science, 2013.