KERESZTES, Réka, and Eszter RÁPÓ. “STATISTICAL ANALYSIS OF AIR POLLUTION WITH SPECIFIC REGARD TO FACTOR ANALYSIS IN THE CIUC BASIN, ROMANIA”. Studia Universitatis Babeș-Bolyai Chemia, vol. 62, no. 3, Sept. 2017, pp. 283-92, doi:10.24193/subbchem.2017.3.24.