(en) Steve Morris, David Humphreys et Dan Reynolds, « Myth, marula, and elephant: an assessment of voluntary ethanol intoxication of the African elephant (Loxodonta africana) following feeding on the fruit of the marula tree (Sclerocarya birrea) », Physiological and Biochemical Zoology, vol. 79, no 2, , p. 363–9 (PMID16555195, DOI10.1086/499983, lire en ligne, consulté le )
(en) Steve Morris, David Humphreys et Dan Reynolds, « Myth, marula, and elephant: an assessment of voluntary ethanol intoxication of the African elephant (Loxodonta africana) following feeding on the fruit of the marula tree (Sclerocarya birrea) », Physiological and Biochemical Zoology, vol. 79, no 2, , p. 363–9 (PMID16555195, DOI10.1086/499983, lire en ligne, consulté le )
(en) Steve Morris, David Humphreys et Dan Reynolds, « Myth, marula, and elephant: an assessment of voluntary ethanol intoxication of the African elephant (Loxodonta africana) following feeding on the fruit of the marula tree (Sclerocarya birrea) », Physiological and Biochemical Zoology, vol. 79, no 2, , p. 363–9 (PMID16555195, DOI10.1086/499983, lire en ligne, consulté le )