Ren, Xing, et al. “Drying Curve Simulation and LF-NMR Online Monitor of Water State in Ursolic Acid Loaded Chitosan Nanoparticles During Microwave Freeze Drying”. International Journal of Agricultural and Biological Engineering, vol. 16, no. 4, Oct. 2023, pp. 263-8, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/7519.