Homayon Ahmad Panahi and  Hossein Sid Kalal and  Atyeh Rahimi,  Separation of Vitamin B2 and B12 byImpregnate HPTLC Plates with Boric Acid.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2008, vol. 18(6). 67 - 69
    [viewed 22 October 2019]. Available from: https://publications.waset.org/pdf/6116.