Nečiporenko, Anatolij, et al. “Nitrate Removal in Woodchip Denitrification Bioreactor – an Approach Combining Mathematical Modelling and PI Control”. Journal of Environmental Engineering and Landscape Management, vol. 30, no. 1, Jan. 2022, pp. 13-21, https://doi.org/10.3846/jeelm.2022.15295.