P Spong

Quantifying complex patterns of bioacoustic variation: use of a neural network to compare killer whale (Orcinus orca) dialects.

V B Deecke, J K Ford, P Spong, 1999, The Journal of the Acoustical Society of America.

Dialect change in resident killer whales: implications for vocal learning and cultural transmission

P Spong, P. Spong, V. Deecke, 2000, Animal Behaviour.