Said, M. I. ., E. Abustam, F. Nur Yuliati, and M. R. B. . Gau. “Evaluation of Yields and Chemical Composition of Unhairing Concentrate (UC) from Cowhide Unhairing Waste (CUW) Produced Using Different Process Methods”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 60, no. 1, Aug. 2021, pp. 112-9, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/12999.