"Zinc". NCBI Bookshelf. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases. 2015-01-10. PMID31643536. अभिगमन तिथि 2020-03-24.
"Zinc". NCBI Bookshelf. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases. 2015-01-10. PMID31643536. अभिगमन तिथि 2020-03-24.