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Palme, R., Touma, C., Arias, N., Dominchin, M.N., & Lepschy, M. (2013). Steroid extraction: Get the best out of faecal samples. Wien Tierärztl Monat – Vet Med Austria, 100, 238–246.
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Palme, R. (2019). Non-invasive measurement of glucocorticoids: Advances and problems. Physiol. Behav., 199, 229–243.
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Palm, A. - K. E., Wattle, O., Lundström, T., & Wattrang, E. (2016). Secretory immunoglobulin A and immunoglobulin G in horse saliva. Vet. Immunol. Immunolpathol., 180, 59–65.
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Palacios, V., Font, E., & Marquez, R. (2007). Iberian wolf howls: acoustic structure, individual variation, and a comparison with North American populations. J Mammal, 88.
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Pack, A. A., & Herman, L. M. (2004). Bottlenosed Dolphins (Tursiops truncatus) Comprehend the Referent of Both Static and Dynamic Human Gazing and Pointing in an Object-Choice Task. J. Comp. Psychol., 118(2), 160–171.
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Outram, A. K., Stear, N. A., Bendrey, R., Olsen, S., Kasparov, A., Zaibert, V., et al. (2009). The Earliest Horse Harnessing and Milking. Science, 323(5919), 1332–1335.
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Osman, F., Zeitler-Feicht, M., Fink, G. W., Arnhard, S., & Krüger, K. (2020). Überprüfung der lichten Weiten von Gitterstäben in der Pferdehaltung [Analysing demands for the clear widths of lattice bars in horse husbandry]. Landtechnik [Agricultural Engineering], 75(1), 24–33.
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O'Brien, P. H. (1988). Feral goat social organization: a review and comparative analysis. Appl Anim Behav Sci, 21.
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Nowak, S., Jedrzejewski, W., Schmidt, K., Theuerkauf, J., Myslajek, R. W., & Jedrzejewska, B. (2006). Howling activity of free-ranging wolves (Canis lupus) in the Bialowieza Primeval Forest and the Western Beskidy Mountains (Poland). J Ethol, 25.
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Nissen, J. (1998). Enzyklopädie der Pferderassen. Stuttgart: Kosmos.
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