1. Particulate forms of radium and barium in uranium mine wastewaters and receiving river water;Benes;Water Research,1983
2. Carney, R.S. (1987). A review of study designs for the detection of long term environmental effects of offshore petroleum activities. In LONG-term environmental effects of offshore oil and gas development activities. (pp. 651–690) London: Elsevier Applied Science.
3. Radium-224 in natural waters measured by γ-ray spectrometry;Elsinger;Analytica Chimica Acta,1982
4. Godoy, J.M. (1996). Radioatividade natural em atividades petrolı́feras: Ocorrência e aplicações. In IV Seminário Quı́mica Analı́tica na Petrobrás. (pp. 253–258), Rio de Janeiro, pp. 253–258)
5. Development of a sequential method for the determination of U-238, U-234, Th-230, Th-228, Ra-228, Ra-226, Pb-210 and Po-210 in environmental samples;Godoy;Journal of Radioanalytical and Nuclear Chemistry,1994