Ho Jae Lee and  Do Gyeum Kim and  Jang Hwa Lee and  Myoung Suk Cho,  A Study for Carbonation Degree on Concrete using a Phenolphthalein Indicator and Fourier-Transform Infrared Spectroscopy.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2012, vol. 62(2). 95 - 101
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/353.