How songbirds deal with large amounts of serial information: retrieval rules suggest a hierarchical song memory. - Dietmar Todt; Henrike Hultsch (Biol. Cybern., 1998)

The Role of Hierarchy Levels in Vocal Imitations of Songbirds. - Dietmar Todt; Jasmin Cirillo; Nicole Geberzahn; Friederike Schleuss (Cybern. Syst., 2001)

Signal coordination in marine mammals: cues from the time domain of vocal interactions. - Dietmar Todt; F. Veit (ISSPA, 2005)