YUSHCHANKA, V., A. HALUZA, and T. KUPRYIANCHYK. “ANALYSIS OF WORK OF BIOLOGICAL TREATMENT TO REMOVAL THE CONNECTION NITROGEN FROM WASTEWATER”. Vestnik of Polotsk State University. Part F. Constructions. Applied Sciences, no. 8, June 2015, pp. 147-52, https://journals.psu.by/constructions/article/view/5960.