Foskolos I, de Soto NAguilar, Madsen PTeglberg, Johnson M. Deep-diving pilot whales make cheap, but powerful, echolocation clicks with 50 µL of air.  2019. Available at: http://www.nature.com/articles/s41598-019-51619-6.

Pérez JMarrero, Jensen FH, Rojano-Doñate L, de Soto NAguilar. Different modes of acoustic communication in deep-diving short-finned pilot whales (Globicephala macrorhynchus). Marine Mammal Science. 2017;33(1):59 - 79. Available at: http://doi.wiley.com/10.1111/mms.2017.33.issue-1.