García Gil, J. M. G. G., and A. Pamplona Roca. “Atomic Absorbtion Spectrophotometer and Minicomputer Raws Control and Correction”. Materiales De Construcción, vol. 23, no. 152, Dec. 1973, pp. 41-46, doi:10.3989/mc.1973.v23.i152.1337.