Phu, Phung Kim, Trinh Ngoc Giang, and Nguyen Van Minh. 2008. “K<sub>x</sub>Ni<sub>y</sub>[Fe(CN)<sub>6</sub>].xH<sub>2</Sub>O Prussian Blue Analogue: A Study of Size Effect on the Structural, Optical and Magnetic Propertiecs”. Communications in Physics 18 (1):43-47. https://doi.org/10.15625/0868-3166/18/1/10689.