F. D. Suyatna, R. Setiabudy, O. Tjandra, and E. Herwana, “Identification of C<sub>5</sub><sup>+</sup> extraband of butyrylcholinesterase and two protein bands cathodic to it”, Med J Indones, vol. 10, no. 3, pp. 144–9, Aug. 2001.