Hill, Nicola A. (2000-07-01). "Why Are There so Few Magnetic Ferroelectrics?". The Journal of Physical Chemistry B. 104 (29): 6694–6709. doi:10.1021/jp000114x. ISSN1520-6106.
Aldred A. T.; Dunlap B. D.; Lam D. J.; Lander G. H.; Mueller M. H.; Nowik I. (1975). "Magnetic properties of neptunium Laves phases: NpMn2, NpFe2, NpCo2, and NpNi2". Phys. Rev. B. 11 (1): 530–544. Bibcode:1975PhRvB..11..530A. doi:10.1103/PhysRevB.11.530.
Aldred A. T.; Dunlap B. D.; Lam D. J.; Lander G. H.; Mueller M. H.; Nowik I. (1975). "Magnetic properties of neptunium Laves phases: NpMn2, NpFe2, NpCo2, and NpNi2". Phys. Rev. B. 11 (1): 530–544. Bibcode:1975PhRvB..11..530A. doi:10.1103/PhysRevB.11.530.
Hill, Nicola A. (2000-07-01). "Why Are There so Few Magnetic Ferroelectrics?". The Journal of Physical Chemistry B. 104 (29): 6694–6709. doi:10.1021/jp000114x. ISSN1520-6106.