Carciu, Gheorghe, Lenuta-Gheorghina Circiu, Simion Alda, Teodor Cristea, Daniela Olaru, and Monica Negrea. 2013. “Contamination of Surface and Underground Waters by Nitrogen in South-West of Romania”. Review on Agriculture and Rural Development 2 (1):185-89. https://analecta.hu/index.php/rard/article/view/13305.