S. Nguyen, N. Tran, T. Tran, C. Ly, L. Le, and Q. Van, “Determination of the boron concentration of OPR 1000 reactor critical state using the Cosi OPR1000 system”, VNUHCM Journal of Science and Technology Development, vol. 19, no. 4, pp. 241-248, Dec. 2016.