WIDJIATI.., BOEDIONOA., SUMITROS. B., HINTINGA., AULANI’AM.., and SUSILOWATIT., “Isolation and Identification of Transforming Growth Factor β from In Vitro Matured Cumulus Oocyte Complexes”, HAYATI J Biosci, vol. 19, no. 1, p. 6, Apr. 2012.