de Santana, Henrique, et al. “Study of the Reaction Between Ammonium Thiocyanate and Fe (II) or Fe (III) Using Infrared Spectroscopy: An Experiment of Prebiotic Chemistry”. Semina: Ciências Exatas E Tecnológicas, vol. 31, no. 1, July 2010, pp. 15-21, doi:10.5433/1679-0375.2010v31n1p15.