Nazemi, E., G. H. Roshani, S. A. Hossein Feghhi, and R. Peyvandi. “Estimation of Void Fraction for Homogenous Regime of Two-Phase Flows in Unstable Operational Conditions Using Gamma-Ray and Neural Networks”. Boson Journal of Modern Physics, Vol. 2, no. 1, Oct. 2015, pp. 51-59, http://www.scitecresearch.com/journals/index.php/bjmp/article/view/344.