WASET
    Y. L. Yung and  Kong Mun Lo,  Evaluation of Solid Phase Micro-extraction with Standard Testing Method for Formaldehyde Determination.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2012, vol. 62(2). 169 - 171
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/5422.