Effect of the molecular weight of polyvinylpyrrolidone on the structure and morphology of materials based on substituted hydroxyapatite for bone implantsElizaveta A. Mukhanova, Inna A. Suprunova, Yana A. Suprunova and Igor Yu. ZabiyakaMATEC Web Conf., 226 (2018) 03012DOI: https://doi.org/10.1051/matecconf/201822603012