T. C. Oliveira, R. P. G. Monteiro, R. M. Moreira, and A. H. de Oliveira, “222Rn Determination in Water and Brine Samples Us-ing Liquid Scintillation Spectrometry”, Braz. J. Rad. Sci., vol. 7, no. 2A (Suppl.), Feb. 2019.