P. K. Bajpai, Naresh Kant Chandan. 1997. “Vibrational Study of Structural Phase Transition in H- Bonded Mixed Crystals of Kx(NH4)1-xPO4(KDP-ADP)”. Journal of International Academy of Physical Sciences 1 (3-4):213-24. https://www.iaps.org.in/journal/index.php/journaliaps/article/view/695.