Ganshin, A., Grigor`ev, V., Maidanov, V., Mikhin, N., Penzev, A., Polev, A., Rudavskii, E., & Rybalko, A. (2000). Properties of solid ³He inclusions embedded in crystalline ⁴He matrix at ultralow temperatures: Low-Temperature Physics and Chemistry in Cryomatrice. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 26(9-10), 884–888. https://doi.org/10.1063/1.1312390