Kajsongkram, T. , Rotamporn, S. , Limbunruang, S. , Thubthimthed, S. (2015), 'Development and Validation of a HPLC Method for 6-Gingerol and 6-Shogaol in Joint Pain Relief Gel Containing Ginger (Zingiber officinale)', World Academy of Science, Engineering and Technology, Open Science Index 108, International Journal of Medical and Health Sciences, 9(12), 813 - 817.