Anomalous behaviour of the low-temperature heat capacity for KCl crystals with heavy univalent impurities M. D. Tiwari, P. N. Ram et V. K. ManchandaJ. Phys. Colloques, 41 C6 (1980) C6-272-C6-274DOI: https://doi.org/10.1051/jphyscol:1980669
