G. Sia

Determination of cyclohexanol in urine and its use in environmental monitoring of cyclohexanone exposure.

C. Ong, K. Tan, S. Chia, 1991, Journal of analytical toxicology.

Environmental and biological monitoring of methyl ethyl ketone (MEK)

K. T. Tan, S. Chia, H. Ong, 1991, Environmental monitoring and assessment.

Biological monitoring of occupational exposure to methyl ethyl ketone

C. Ong, K. Tan, W. Phoon, 1991, International archives of occupational and environmental health.