Geraldo, R. R.; Paschuk, S. A.; Barreto, R. C.; Corrêa, J. N.; Zahn, G. S.; Cardoso da Silva, P. S.; Malagi da Silva, A. C.; Narloch, D. C.; Araujo, I. C. Application of Semi-Empirical Model for the Evaluation of Radium Activity in Phosphogypsum Used As Component of Clinker. Braz. J. Rad. Sci. 2021, 9.