Shindell, D T; Chin, M; Dentener, F; Doherty, R M; Faluvegi, G; Fiore, A M et al. A multi-model assessment of pollution transport to the Arctic, article, March 13, 2008; (https://digital.library.unt.edu/ark:/67531/metadc896985/m1/1/: accessed April 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .