1. Armstrong, R., Gibson, N.A., Hosking, J.W. and Weatherburn, D.C. 1967. The preparation and properties of some quaternary arsonium compounds.Australian J. Chem.,20, 2771–2776.
2. Braier, H.A. and Eppolito, J. 1975. Determination of trace metals in petroleum: instrumental methods. In: Yen, T.F. (ed.),The Role of Trace Metals in Petroleum, pp. 65–87. Ann Arbor Science, Ann Arbor, Michigan.
3. Carr, C.D. and Borst, J.E. 1978. Use of inductively coupled plasma spectroscopy for the analysis of undigested organic materials and oils. Applied Research Laboratory, Sunland, California. Presented at the 1978 Pittsburgh Conference.
4. Clark, P.J., Zingaro, R.A., Irgolic, K.J. and McGinley, A.N. 1980. Arsenic and selenium in Texas lignite.International J, Environ. Analytical Chem.,7, 295–314.
5. Davis, W.E. and Associates. 1968.National Inventory of Sources of Emissions. Arsenic, Beryllium, Manganese, Mercury and Vanadium, Arsenic. Section I, 51pp. Leawood, Kansas.