B. P. Lisboa, J. M. Halket, I. Ganschow, and M. del C. Ruiz-Gonzalez, “Steroid excretion in a case of 17 alpha-hydroxylase deficiency investigated by computerized gas chromatography-mass spectrometry”., Acta Med Port, vol. 1, no. 4, pp. 433–449, Aug. 1979.