Thermodynamic properties of small amorphous and crystalline Silica particles at low temperaturesA. Nittke, P. Esquinazi, H.-C. Semmelhack, A. L. Burin and A. Z. PatashinskiiEur. Phys. J. B, 8 1 (1999) 19-30DOI: https://doi.org/10.1007/s100510050664