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APA Citation
Casal, N., Manteca, X., Escribano, D., Cerón, J. J., & Fàbrega, E. (n.d.). effect of environmental enrichment and herbal compound supplementation on physiological stress indicators (chromogranin A, cortisol and tumour necrosis factor-α) in growing pigs. Animal, 11, 1228–1236. http://access.bl.uk/ark:/81055/vdc_100046742228.0x000005