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Alonso L, Fontecha J, Lozada L, Fraga MJ, Juárez M(17 augusti 1999).”Fatty acid composition of caprine milk: major, branched-chain, and trans fatty acids”.Journal of Dairy Science"82"(5): ss.878–84. doi:10.3168/jds.S0022-0302(99)75306-3. PMID 10342226.