Lipey, N. A., K. G. Linkov, D. V. Yakovlev, V. V. Volkov, and V. B. Loschenov. “Fiber Optic Devices for Endobiliary Photodynamic Therapy”. KnE Engineering, Vol. 3, no. 6, Oct. 2018, pp. 196–201, doi:10.18502/keg.v3i6.2992.