“On the Photometric Determination of Small Amounts of Magnesium (an Adaptation of the Titan Yellow Method)”. Revista Da Faculdade De Medicina Veterinária, Universidade De São Paulo, vol. 4, no. 2, Dec. 1950, pp. 295-02, https://doi.org/10.11606/issn.2318-5066.v4i2p295-302.