Zhu Н., Wu В., and D. Cao. “Measuring Thermal Conductivity of Frozen Soil Using Fiber Optic Sensors”. Eurasian Journal of Applied Engineering and Technology (EJAET), vol. 135, no. 2, June 2021, pp. 82-93, doi:10.32523/2616-7263-2021-135-2-82-93.