... C. O., A. Y. Khlystov, and S. N. Pandis (2004b), Nucleation eventsduring the Pittsburgh Air Quality Study: Description and relation to keymeteorological, gas phase, and aerosol parameters, ... Environ.,29(23), 3527 –3544.Wittig, B., N. Anderson, A. Y. Khlystov, S. N. Pandis, C. Davidson, and A. L. Robinson (2004a), Pittsburgh Air Quality Study overview and initial scientific findings, Atmos. ... Pittsburgh Air Quality Study: Results, interpretation, and quantification of primary and secondary contributionsDylan B. Millet,1,2Neil M. Donahue,3Spyros N. Pandis,3Andrea Polidori,4Charles...