Rajchasom, S., and P. Phanphattharachai. “Study of Drying Condition and Extraction Process of Protein and Antioxidants from Porcine Placenta”. RMUTP Research Journal Sciences and Technology, vol. 13, no. 2, Dec. 2019, pp. 13-23, doi:10.14456/jrmutp.2019.18.