Pingjun Guo Gardner, R. P., Guo, P., Sood, A., Mayo, C. W., Gehrke, R. J., & Dobbs, C. L. (1998, July). Monte Carlo aided treatments of the nonlinear inverse PGNAA measurement problem for various continuous on-line applications. JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, Vol. 233, pp. 105–107. https://doi.org/10.1007/BF02389655 Gardner, R. P., Guo, P., Wang, Y. Y., Sood, A., Lee, S. H., & Dobbs, C. L. (1997). Feasibility of neutron activation methods for measurement of sodium and aluminum in green liquor. APPLIED RADIATION AND ISOTOPES, 48(10-12), 1355–1372. https://doi.org/10.1016/S0969-8043(97)00131-0 Gardner, R. P., Sood, A., Wang, Y. Y., Liu, L., Guo, P., & Gehrke, R. J. (1997). Single peak versus library least-squares analysis methods for the PGNAA analysis of vitrified waste. APPLIED RADIATION AND ISOTOPES, 48(10-12), 1331–1335. https://doi.org/10.1016/S0969-8043(97)00127-9 Guo, P., Ao, Q., & Gardner, R. P. (1997). Spectral gamma-ray log interpretation algorithms using the Monte Carlo multiply scattered components approach. APPLIED RADIATION AND ISOTOPES, 48(10-12), 1373–1383. https://doi.org/10.1016/S0969-8043(97)00132-2