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APA Citation
Vega, M., Fuentes, S., Martín, I., & Llanos, J. (2017). up-conversion photoluminescence of BaTiO3 doped with Er3+ under excitation at 1500 nm. Materials research bulletin, 86, 95–100. http://access.bl.uk/ark:/81055/vdc_100039475356.0x000056