Kohútová, Michaela, et al. “Selected Physical Parameters of Spruce Chips Vs. Alkali Consumptions in the Impregnation Step of Kraft Pulping”. BioResources, vol. 17, no. 4, Nov. 2022, pp. 6490-5, https://ojs.bioresources.com/index.php/BRJ/article/view/22097.