Zubair Ahmad and  M. H. Sayyad and  M. Yaseen and  M. Ali,  Investigation of 5,10,15,20-Tetrakis(3-,5--Di-Tert-Butylphenyl)Porphyrinatocopper(II) for Electronics Applications.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2011, vol. 52(4). 380 - 383
    [viewed 29 January 2020]. Available from: https://publications.waset.org/pdf/5234.