Izquierdo Arroyo, José María, and Luis M. Moreno Fernández. 1992. “Designing a Periodicals-Based Current Information Data Base, Managed through a Combinatory-Structured Faceted Language”. Revista Española De Documentación Científica 15 (1):44-63. https://doi.org/10.3989/redc.1992.v15.i1.44.