Phu, P. K., Giang, T. N., & Minh, N. V. (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