C. Ryu

Development of a natural preservative system using the mixture of chitosan‐Inula helenium L. extract

T. Kajiuchi, S-H Kim, S. Seo, 2002, International journal of cosmetic science.

Protective effect of antioxidant supplementation in sperm-preparation medium against oxidative stress in human spermatozoa.

S. Roh, H. Chi, E. Chun, 2008, Human reproduction.