Cirillo, J. (2001) - Ingroup/outgroup effects of whispered vocalisations. Advances in Ethology 36:137.

Cirillo, J. (2004) - Communication by unvoiced speech: the role of whispering. Anais Academia

Brasiliera de Ciencies 76: 413-424.

Cirillo, J. & D. Todt (2002) - Decoding whispered vocalizations: relationships between social and emotional variables. PIC Neural Information Processing 9: 1559-1563.

Cirillo, J. & D. Todt (2004) - Why whispering could have evolved through biological ritualisation. Revista de Ethologia 5: 153-154.

Cirillo, J. & D. Todt (2005) - Perception and judgement of whispered vocalisations. Behaviour 142: 98-125.

Hammerschmidt, K. & D. Todt (1995): Individual differences in vocalizations of young Barbary macaques:

A multi-parametric analysis. Behaviour 132: 166-178.

Hultsch, H. & D. Todt (1986) Signal Matching: Zeichenbildung durch mustergleiches Antworten. Z. f.

Semiotik 8: 223-244.

Hultsch, H. & Todt, D. (1992b) Einsatz und Interpretation geflüsterter Signale. In: K. Pawlik & K. Stapf

(eds.): Umwelt und Verhalten. Bern/toronto, Huber Verlag. Pp: 391-406.

Kipper, S. & D. Todt (2001) Variation of sound parameters affects the evaluation of human laughter.

Behaviour 138: 1161-1178.

Kipper, S. & Todt, D. (2003a) - Dynamic-acoustic variation causes differences in the evaluation of

laughter. Perceptual and Motor Skills 96: 799-809.

Kipper, S. & Todt, D. (2003b) - The role of rhythm and pitch in the evaluation of human laughter. Journal of

Nonverbal Behavior 27:255-272.

Kipper, S. & Todt, D. (2005) - The sound of laughter: recent concepts and findings in research into laughter

vocalisations. Legenda: Studies in Comparative Literature 8: 24-33.-

Mundry R & Todt D (2000) - Automated measurement of tonal vocalisations: methods and examples of their

application. Measuring Behaviour 3: 47-52.

Todt, D. (1986) Hinweischarakter & Mittlerfunktion von Verhalten. Z. Semiotik 8: 183-232.

Todt, D. (1988) Serial calling as a mediator of interaction processes: Crying in primates. In: Todt, D.,

Goedeking, P. & D. Symmes (eds.): Primate vocal communication. Springer-Verlag,

Berlin/Heidelberg/New York: 88-107.

Todt, D. (1997) The Codex of Social Play : A System of Rules that can Prevent Ingroup Violence. Schriften

zur Rechtspsychologie 3: 305-315.

Todt, D. and A. Haut (1992) One for Tim and one for Tom. Ein Setting für Studien an Zwillingskindern.

In: K. Pawlik & K. H. Stapf (eds.): Umwelt und Verhalten. Huber Verlag, Bern/Toronto/ Seattle: 383-390.

Todt, D. & H. Hultsch (1993) Biologische Grundlagen des Dialogs. In: Wessel, K. F. & D. Naumann:

Kommunikation und Humanontogese; Kleine Verlag, Bielefeld. pp: 53-76.

Todt, D. & M. Naguib (2000). Vocal interactions in birds: The use of song as a model in communication.

Advances in the Study of Behaviour 29: 247-296.

Todt, D. & H. Brumm (2001) Vigilance, Windows and Virtual Sign Stimuli: Psycho-biological Aspects of

Video Watching. Paragrana 10: 173-195.

Todt, D. & S. Kipper (2003) - Der Begriff 'Kommunikation' in den Biowissenschaften. Signifikation:

Beiträge zur Kommunikationswissenschaft 5: 29-59.

Todt, D. (2003) - Rituale als Spielmaterial einer denkbaren Evolution von ästhetischer Erfahrung.

In: J. Küpper & C. Menke: Dimensionen ästhetischer Erfahrung. Frankfurt a.M.,

Suhrkamp Taschenbuch Verlag, pp. 308-332.

Todt, D. (2004) - From birdsong to speech. Anais Academia Brasiliera de Ciencies 76: 201-208.

Todt, D. (2005) - Akustische Kommunikation: Interaktives Problemlösen oder Schritte auf dem Wege zur

Sprache? (in press).

Vettin, J. & D. Todt (2004) - Laughter in conversation: features of occurrence and acoustic structure.

Journal of Nonverbal Behavior 28: 93-116.

Vettin, J. & D. Todt (2005) - Human laughter, social play and play vocalisations of non-human primates: an

evolutionary approach. Behaviour 142: 217-240.

Wiedenmann, G. & D. Todt (1990) Discrete responses of adult subjects during exposure to infant cry

sequences. Early Child Development and Care 65: 179-188