[1]
A. Szabó Nagy, G. Simon, I. Vass, J. Erdős, and I. Vadász Reményi, “Monitoring of the Nitrogen Level in the Hungarian upper Section of the Danube (1848-1766 river km)”, Acta Tech. Jaurinensis, vol. 4, no. 3, pp. pp. 347–355, Sep. 2011.