Duc, Hoang Huu, et al. “Correlation Between \(^{137}\text{Cs}\) and \(^{40}\text{K}\) Concentration in Soil and Tea Tree in Luong My Farm, Hoa Binh Province, Vietnam”. <i>Communications in Physics</i>, vol. 29, no. 4, Dec. 2019, p. 527, doi:10.15625/0868-3166/29/4/14417.