1. Laser Engineering of the Cartilage. Bagratishvili VN, Sobol’ EN, Shekhter AB, eds. Moscow, 2006. Russian.
2. Nikolaeva TI, Molchanov MV, Laurinavichus KS, Kaptsov VV, Shehovtsov PV. Study of enzymatic hydrolysis of collagen proteins of cartilage tissue. Mezhdunarod. Zh. Priklad. Fundament. Issled. 2016;(10-3):442-447. Russian.
3. Pivnenko TN, Kovalev NN, Zaporozhents TS. Bioactive Food Additive “Astrofish” (to Help the Practitioner). Moscow, 2015. Russian.
4. Alkayali A. US Patent 6025327 A. Hydrolysed collagen type II and use thereof. February 15, 2000.
5. Huo J.X, Zhao Z. Study on enzymatic hydrolysis of Gadus morrhua skin collagen and molecular weight distribution of hydrolysates. Agricul. Sci. China. 2009;8(6):723-729.