Martínez-Victoria, M., Maté-Sánchez-Val, M. and Arcas-Lario, N. 2017. The significance of the interconnection of second-level cooperatives and their peer-associated cooperatives for productivity growth. Spanish Journal of Agricultural Research. 15, 1 (Apr. 2017), e0103. DOI:https://doi.org/10.5424/sjar/2017151-10270.