Zhou, X., P. Shen, Y. Zhao, D. Jiang, and J. Huang. “Photosynthetic Characteristics of Summer Maize under Different Planting Patterns and the Responses to Nitrogen Application of Previous Crop”. Bioscience Journal, vol. 35, no. 3, June 2019, pp. 674-81, doi:10.14393/BJ-v35n3a2019-41148.