Hierarchy effect on electronic structure and core-to-valence transitions in bone tissue: perspectives in medical nanodiagnostics of mineralized boneDmitrii O. Samoilenko, Alexander S. Avrunin and Andrey A. PavlychevEur. Phys. J. D, 71 7 (2017) 180DOI: https://doi.org/10.1140/epjd/e2017-80051-8