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APA Citation
Alvarez‐Salazar, C. E., Peres, O. L. G., & Sánchez‐Vega, B. L. (2019). the dark matter puzzle in a class of models with gauge symmetry SU(3)C ⊗ SU(3)L ⊗ U(1)N. Astronomische Nachrichten, 340(1), 135–138. http://access.bl.uk/ark:/81055/vdc_100079609202.0x00005e