M. M. Terzic, D. Plecas, M. M. Bulajic, B. Stimec, and B. Velimirovic, “Prediction of Fetal Distress by Low Intra-amniotic Lysozyme Level ”, Thai J Obstet Gynaecol, vol. 6, no. 1, pp. 19–21, Jan. 1994.