de Oliveira Loureiro, Celso. Simulation of the Steady-State Transport of Radon from Oil intoHouses with Basements under Constant Negative Pressure, thesis or dissertation, May 1, 1987; (https://digital.library.unt.edu/ark:/67531/metadc882214/m1/1/: accessed May 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .