Rowley, Adrian T.; Parkin, Ivan P. (1993). "Convenient synthesis of lanthanide and mixed lanthanide phosphides by solid-state routes involving sodium phosphide". Journal of Materials Chemistry. 3 (7). Royal Society of Chemistry (RSC): 689. doi:10.1039/jm9930300689. ISSN0959-9428.
Rowley, Adrian T.; Parkin, Ivan P. (1993). "Convenient synthesis of lanthanide and mixed lanthanide phosphides by solid-state routes involving sodium phosphide". Journal of Materials Chemistry. 3 (7). Royal Society of Chemistry (RSC): 689. doi:10.1039/jm9930300689. ISSN0959-9428.