Olszewska, Aneta, et al. “Application of Ultraviolet Absorption Spectroscopy for the Determination of Nitrogen Compounds in Anthropogenically Impacted Surface Waters: A Case Study of the Kłodnica River”. Opto-Electronics Review, vol. 34, no. 3, Sept. 2026, p. 5984, doi:10.24425/opelre.2026.5984.