MATRICES FOR TISSUE ENGINEERING BASED ON ULTRAFINE FIBERS AND MICROPARTICLES OF POLY(HYDROXYBUTYRATE) Article Bonartsev A.P., Ol’khov A.A., Khan O.I., Kucherenko E.L., Filatova A.G., Zernova Y.N., Iordanskii A.L. Inorganic Materials: Applied Research. Maik Nauka Publishing / Springer SBM. Vol. 12. 2021. P. 974-979