Certificate for a computer program № 2019610157 "A program for studying the electrical conductivity of 3-D nanocomposite bioconstructions based on a protein matrix impregnated with a carbon-nanotube framework for electrical stimulation of cartilage and bone tissue cell growth." Registered in the Computer Software Registry on 01/09/2019. Authors: G.V. Savostyanov, O.E. Glukhova, A.Yu. Gerasimenko, M.S. Saveliev, D.I. Ryabkin.