Lamprecht, Jürg Verhaltensphysiologie, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Lamprecht, J. (1984). Measuring the strength of social bonds: Experiments with hand-reared goslings (Anser indicus). Behaviour, 91(1), 115-127. doi:10.1163/156853984x00245.