T. Susantiningsih, R. Ridwan, A. R. Prijanti, M. Sadikin, and H.-J. Freisleben, “Schizonticidal effect of a combination of Amaranthus spinosus L. and Andrographis paniculata Burm. f./Nees extracts in Plasmodium berghei-infected mice”, Med J Indones, vol. 21, no. 2, pp. 66–70, May 2012.