S. H. M. Poort, W. Janssen and G. Blasse, “Optical Properties of Eu2+-Activated Orthosilicates and Orthophosphates,” Journal of Alloys and Compound, Vol. 260, No. 1-2, 1997, pp. 93-97.
 Y. S. Tang, S. F. Hu, C. C. Lin, N. C. Bagkar and R. S. Liu, “Thermally Stable Luminescence of KSrPO4:Eu2+ Phosphor for White Light UV Light-Emitting Diodes,” Applied Physics Letter, Vol. 90, No. 15, 2007, Article ID. 151108. http://dx.doi.org/ 10.1063/1.2721846
 M. E. Hannah, A. P. Piquette, M. Anc, J. McKittrick, J. Talbot, J. Han and K. C. Mishra, “A Study of Blue Emitting Phosphors, ABPO4,” ECS Transaction, Vol. 41, No. 37, 2012, pp. 19-25. http://dx.doi.org/10.1149/1.3697441
 S. Zhang, Y. Huang and H. J. Seo, “The Spectroscopy and Structural Sites of Eu2+ Ions Doped KCaPO4 Phosphor,” Journal of Electrochemical Society, Vol. 157, No. 7, 2010, pp. J261-J266.
 S. D. More, M. N. Meshram, S. P. Wankhede, P. L. Muthal, S. M. Dhopte and S. V. Moharil, “Luminescence in LiCaPO4,” Physica B: Condensed Matter, Vol. 406, No. 5, 2011, pp. 1178-1181.
 M. Kakihana, “Synthesis of High-Performance Ceramics Based on Polymerizable Complex Method,” Journal of Ceramic Society of Japan, Vol. 117, No. 1368, 2009, pp. 857-862. http://dx.doi.org/10.2109/jcersj2.117.857
 W. Weng, L. Huang and G. Han, “The Alkoxide Sol-Gel Process in the Calcium Phosphate System and Its Applications,” Applied Organometallic Chemistry, Vol. 13, No. 8, 1999, pp. 555-564.
 F. Rashchi and J. A. Finch, “Polyphosphates: A review Their Chemistry and Application with Particular Reference to Mineral Processing,” Minerals Engineering, Vol. 13, No. 10-11, 2000, pp. 1019-1035.
 M. Kim, M. Kobayashi, H. Kato and M. Kakihana, “Enhancement of Luminescence Properties of a KSrPO4:Eu2+ Phosphor Prepared Using a Solution Method with a Water-Soluble Phosphate Oligomer,” Journal of Materials Chemistry C, Vol. 1, No. 36, 2013, pp. 5741-5746.
 D. J. Tracy and R. L. Reierson, “Commercial Synthesis of Monoalkyl Phosphates,” Journal of Surfactants and Detergents, Vol. 5, No. 2, 2002, pp. 169-172.
 P. Lightfoot, M. C. Pienkowski, P. G. Brucea, I. Abrahamd and E. Eh, “Synthesis and Structure of LiCaPO4, by Combined X-Ray and Neutron Powder Diffraction,” Journal of Materials Chemistry, Vol. 1, No. 6, 1991, pp. 1061-1063. http://dx.doi.org/10.1039/jm9910101061
 C. Wan, J. Meng, F. Zhang, X. Deng and C. Yang, “An Efficient Blue-Emitting Phosphor LiCaPO4:Eu2+ for White LEDs,” Solid State Communications, Vol. 150, No. 31-32, 2010, pp. 1493-1495.
 J. K. Han, M. E. Hannah, A. Piquette, J. B. Talbot, K. C. Mishra and J. McKittrick, “Sol-Gel Synthesis of Single Phase, High Quantum Efficiency LiCaPO4:Eu2+ Phosphors,” ECS Journal of Solid State Science and Technology, Vol. 1, No. 1, 2012, pp. R37-R40.
 T. Goto, N. Wakamatsu, H. Kamemizu, M. Iijima, Y. Doi and Y. Moriwaki, “Sintering Mechanism of Hydroxyapatite by Addition of Lithium Phosphate,” Journal of Materials Science: Materials in Medicine, Vol. 2, No. 3, 1991, pp. 149-152. http://dx.doi.org/10.1007/BF00692973