Cooperative behavior between oscillatory and excitable units: the peculiar role of positive coupling-frequency correlationsBernard Sonnenschein, Thomas K. DM. Peron, Francisco A. Rodrigues, Jürgen Kurths and Lutz Schimansky-GeierEur. Phys. J. B, 87 8 (2014) 182DOI: https://doi.org/10.1140/epjb/e2014-50274-2