1. Bolı́var JP. Aplicaciones de las espectrometrı́as alfa y gamma al estudio del impacto radiactivo producido por industrias no nucleares. PhD Thesis, University of Sevilla, Seville, 1995. In Spanish.
2. Radioactivity involved in the production of fertilizers: radioecological impact;Bolı́var,1993
3. A generalized transmission method for gamma-efficiency determinations in soil samples;Bolı́var;Nucl Geophys,1994
4. Fluxes and distribution of natural radionuclides in the production and use of fertilizers;Bolı́var;Appl Radiat Isot,1995
5. Enhancement of natural radioactivity in soils and salt-marshes surrounding a non nuclear industrial complex;Bolı́var;Sci Total Environ,1995