Ma, Zhichao, Shaoxu Chen, Yongjun Yin, Yanying Zhou, Xiaodan Lu, and Tingting Lin. 2021. “Study on Measurement Model of Lignin Content in Pulp After Alkaline Extraction”. Journal of Environmental Engineering and Landscape Management 29 (2):94-100. https://doi.org/10.3846/jeelm.2021.14182.