1. Chai, K.S., Lee, H.P., Seow, A., Shanmugarathnam, K.: Trends in Cancer Incidence in Singapore 1968–1992. Singapore Cancer Registry Report, Vol. 4. Singapore Cancer Registry, Singapore (1996)
2. Montenegro, E.C., Baptista, G.P., De Castro Faria, L.V., Paschoa, A.S.: Correlation Factor for Hair Analysis by PIXE. Nucl. Instr. Methods. 168 (1980) 479–483
3. Obrusnîk, O., Bencko, V.: INAA Study on Trace Elements in Hair of Three Selected Groups in Czechoslovakia. Radiochem. Radioanal. Lett. 38 (1979) 189–196
4. Wu, P., Straughan, R., Ong, I., Heng, K.L.: Development of a Process Diagnosis and Optimization Tool for Industrial Process: A Pattern Recognition/Neural Network Code on NSRC’s IBM SP2. In: Chandra, T., Leclair, S.R., Meech, J.A., Verma, B., Smith, M., Balachandran, B. (eds.): Australiasia-Pacific Forum on Intelligent Processing and Manufacturing of Materials. Australia (1997) 235–239
5. Chambers, J.M., Hastie, T.J. (eds.): Statistical Models in S.Wadsworth and Brooks Cole Advanced and Software. Pacific Grove, California (1992)