Nahid Ghasemi and  Mohammad Goodarzi and  Morteza Khosravi,  Principal Component Analysis-Ranking as a Variable Selection Method for the Simultaneous Spectrophotometric Determination of Phenol, Resorcinol and Catechol in Real Samples.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2009, vol. 32(8). 2134 - 2139
    [viewed 15 April 2021]. Available from: