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APA Citation
Spillmann, B., van Schaik, C. P., Setia, T. M., & Sadjadi, S. O. (n.d.). who shall I say is calling? Validation of a caller recognition procedure in Bornean flanged male orangutan (Pongo pygmaeus wurmbii) long calls. Bioacoustics, 26(2), 109–120. http://access.bl.uk/ark:/81055/vdc_100044586547.0x00004c