Motifs in co-authorship networks and their relation to the impact of scientific publicationsL. Krumov, C. Fretter, M. Müller-Hannemann, K. Weihe and M.-T. HüttEur. Phys. J. B, 84 4 (2011) 535-540DOI: https://doi.org/10.1140/epjb/e2011-10746-5