Batan, I Wayan, Lay, Bibiana Widiati, Djuwita, Ita, ., Supar, AND Boediono, Arief. " Peranan Zona Pelusida Sebagai Barier Terhadap Cemaran Escherichia coli K99 (THE ROLE OF ZONA PELLUCIADA AS A BARRIER OF E COLI K99 CONTAMINATION)" Jurnal Veteriner [Online], Volume 14 Number 2 (17 September 2013)