Rueda, J.; Perez, J.; Garcia, A.; Usuriaga, J. Determination of Naturally Occurring Radioactive Materials-Norm (Ra-226, Ra-228) in Synthetic Flowback Developed at Laboratory Scale from Rocks of the La LUNA-1 Well, Colombia, and Benchmarking With Marcellus and Eagle Ford Shale Plays. JETIA 2021, 7, 45-61.