Trillmich, F., Meise, K., Kalberer, S., Mueller, B., Piedrahita, P., Porschmann, U., et al. (2016).
On the challenge of interpreting census data: Insights from a study of an endangered pinniped. PLoS
One, 11(5): e0154588. doi:10.1371/journal.pone.0154588.