M.I. Bagatskii, V.V. Sumarokov, and A.V. Dolbin, A simple low-temperature adiabatic calorimeter for small samples, Low Temp. Phys. 37, (2011) [Fiz. Nizk. Temp. 37, 535-538, (2011)] DOI: https://doi.org/10.1063/1.3605700.