Subakir, Sri B., Dewi I. S. Santoso, Minarma Siagian, and I.G.A.F. Maging. 1994. “Endothelial Cell Culture from Human Umbilical Cord Vein”. Medical Journal of Indonesia 3 (2):65-8. https://doi.org/10.13181/mji.v3i2.944.