Intercomparision and evaluation of four semi-continuous pm2.5 sulfate instruments

Drewnick, F., J.J. Schwab, O. Hogrefe, S. Peters, L. Husain, D. Diamond, R.J. Weber, and K. Demerjian (2003), Intercomparision and evaluation of four semi-continuous pm2.5 sulfate instruments, Atm. Environ., 37, 3335-3350.