Efremov, Sergey, al-Farabi Kazakh National University, Kazakhstan

• Vol 72 No 4 (2013): Chemical Bulletin of Kazakh National University - Inorganic Chemistry
  Study of physical chemical characteristics of shungite rocks from Kazakhstan and Russia using high-resolution physical chemical methods
  Abstract  PDF (Русский)
• Vol 66 No 2 (2012): Chemical Bulletin of Kazakh National University - Other Papers
  Study of physical chemical characteristics of a shungite
  Abstract  PDF (Русский)