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Li, J.; Liu, B.; Chen, Q.; Lu, Y.; Liu, Z. Synthesis of M­­­­­­₁₋₃ₓAl₂O₄:Eu²⁺ₓ/Dy³⁺₂ₓ (M²⁺= Sr²⁺, Ca²⁺ and Ba²⁺) Phosphors With Long-Lasting Phosphorescence Properties via Co-Precipitation Method. CR 2019, 1, 112-117.