Scheiber, I. B. R., & Weiß, B. M. (2013). Beyond the pair bond: Extended family
bonds and female-centred clan formation. In I. B. R. Scheiber, B. M. Weiß, J. Hemetsberger, & K. Kotrschal (Eds.), The social life of greylag geese: Patterns, mechanisms and evolutionary
function in an avian model system (pp. 105-118). Cambridge: Cambridge Univ. Press.