Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sun Qiujuan and Guo Yuming and Li Jianhui and Zhang Tianguo and Wen Jinlei,"Effects of Methionine Hydroxy Analog Chelated Cu/Mn/Zn on Laying Performance, Egg Quality, Enzyme Activity and Mineral Retention of Laying Hens",The Journal of Poultry Science,13467395,Japan Poultry Science Association,2012,49,1,20-25,https://cir.nii.ac.jp/crid/1390282680182485120,https://doi.org/10.2141/jpsa.011055