Citation:
Li W, Wang C, Shen H, Su S, Shen G, Huang Y, Zhang Y, Chen Y, Chen H, Lin N, et al. Concentrations and origins of nitro-polycyclic aromatic hydrocarbons and oxy-polycyclic aromatic hydrocarbons in ambient air in urban and rural areas in northern China. Environmental Pollution [Internet]. 2015;197:156-164.