1. Hopke, P.K. Receptor Modeling for Air Quality Management; Elsevier: Amsterdam, The Netherlands, 1991.
2. Jollife, I.T. Principal Component Analysis; Springer Verlag: New York, 1986.
3. Huber, P.J. Robust Statistics; John Wiley: New York, 1981.
4. Ryan, W.M.; Badgett-West, C.R.; Holtz, D.R.; Peters, T.A.; Cooper, H.A.; Ono, D. Reconciliation of Receptor and Dispersion Modeling Impacts of PM10 in Hayden, Arizona. In PMmImplementation of Standards; APCA transactions series TR-13; Air Pollution Control Association: Pittsburgh, PA, 1988; pp 419–429.