Can Coronene and/or Benzo(a)pyrene/Coronene ratio act as unique markers for vehicle emission?

Citation:

Shen G, Chen Y, Wei S, Fu X, Ding A, Wu H, Tao S. Can Coronene and/or Benzo(a)pyrene/Coronene ratio act as unique markers for vehicle emission?. Environmental Pollution [Internet]. 2014;184:650-653.