Keiya Shirahama, Keiichi Yamamoto, and Yoshiyuki Shibayama, Superfluidity of ⁴He confined in nanoporous media: Жидкий гелий, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 350-356, (2008)] DOI: https://doi.org/10.1063/1.2908885.