Wonodirekso, S., W. Hadisaputra, B. Affandi, B. Siregar, and P. A. Rogers. “Cytokeratin 8,18 and 19 Expressions, Epithelial Shedding, and Stromal Extravasation in Endometrium of Norethisterone Enanthate (NET-EN) Progestogen Contraceptive Users (A Preliminary Report)”. Medical Journal of Indonesia, vol. 7, no. 1, Jan. 1998, pp. 16-24, doi:10.13181/mji.v7i1.792.