Cheney DL, & Seyfarth RM. (1992). Characterizing the mind of another species. Behav. Brain Sci., 15, 172.
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Dugatkin, L. A., Mesterton-Gibbons, M., & Houston, A. I. (1992). Beyond the prisoner's dilemma: Toward models to discriminate among mechanisms of cooperation in nature. Trends Evol. Ecol., 7, 202–205.
Abstract: The iterated prisoner's dilemma game, or IPD, has now established itself as the orthodox paradigm for theoretical investigations of the evolution of cooperation; but its scope is restricted to reciprocity, which is only one of three categories of cooperation among unrelated individuals. Even within that category, a cooperative encounter has in general three phases, and the IPD has nothing to say about two of them. To distinguish among mechanisms of cooperation in nature, future theoretical work on the evolution of cooperation must distance itself from economics and develop games as a refinement of ethology's comparative approach.
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Noë, R. (1992). Alliance formation among male hamadryas baboons: shopping for profitable partners. In A. H. Harcourt, & F. B. M. deWaal (Eds.), Coalitions and alliances in humans and other animals (pp. 284–321). Oxford: Oxford University Press.
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Gutierrez Rincon, J. A., Vives Turco, J., Muro Martinez, I., & Casas Vaque, I. (1992). A comparative study of the metabolic effort expended by horse riders during a jumping competition. Br J Sports Med, 26(1), 33–35.
Abstract: The three main Olympic horse riding disciplines are dressage, jumping, and three-day eventing (including dressage, cross country and jumping). In the jumping discipline (obstacle race), the 'team' (horse rider) is judged under the different conditions that might take place in a varied run. The horse is expected to show power and ability; the rider must show riding skill and good physical condition. However, the different conditions encountered by the rider during competition (duration of event, continuous isometric working level, especially in the inferior trunk, lead us to consider the need for a rider to develop different metabolic pathways to meet the high energy requirements of the competition.
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