The methodology for obtaining biologically active substances is given: phytol, isophytol, tokferol, phylloquinone and their application in medicine and the national economy.
Talyshinsky, G.M. (1990). Biochemistry of the polyploid mulberry leaf. Baku: Elm. p. 132.
Lamm G. Ya., Khamidova Zh. B., Doncheva E. F., Parshiev B. A. (1991). Silk. No 1, p. 14.
Tarasevich, M. R., Radyushkina K.A., Bogdanovskaya V.A. (1991). Elektrokhimiya porfirinov. Moskva, Nauka. (3). p. 312.
Cheng, L., Richter-Addo, G. B., Guilard, R., Smith, K., & Kadish, K. M. (2000). in The Porphyrin Handbook, Eds K. M. Kadish, KM Smith, and R. Guilard, Acad. Press., (4), p. 221.