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Burrell, L. S., Johnston, C. T., Schulze, D., Klein, J., White, J. L., & Hem, S. L. (2000). Aluminium phosphate adjuvants prepared by precipitation at constant pH. Part I: composition and structure. Vaccine, 19(2-3), 275–281. doi:10.1016/s0264-410x(00)00160-2 
10.1016/s0264-410x(00)00160-2