URL
Hardisty A, Roberts D, Alonso E, Arvanitidis C, Badia RM, Basset A, et al. Letter to the editor. Bulletin of the British Ecological Society. 2013;44:50.
http://dx.doi.org/10.3897/zookeys.150.2149
http://dx.doi.org/10.3897/zookeys.150.2146
http://dx.doi.org/10.3897/zookeys.150.1877