Communally breeding Bechstein's bats have a stable social system that is independent from the postglacial history and location of the populations.
Kerth G., Petrov B., Conti A., Anastasov D., Weishaar M., Gazaryan S., Jaquiéry J., König B., Perrin N., Bruyndonckx N., 2008. Molecular Ecology, 17 (10) pp. 2368-2381. Peer-reviewed.