Gomes, C. M. A., Golino, H. F., Santos, M. T., & Ferreira, M. G., (2014). Formal-Logic Development Program: Effects on Fluid Intelligence and on Inductive Reasoning Stages. British Journal of Education, Society & Behavioural Science, 4(9), 1234-1248. Retrieved from http://www.sciencedomain.org/reviewhistory.php?iid=488&id=21&aid=4724