(1)
E.A. Popov, J. Eloranta, J. Ahokas, and H. Kunttu,
On the formation mechanism of impurity-helium solids: evidence for extensive clustering
,
Low Temp. Phys.
29, (2003) [
Fiz. Nizk. Temp.
29, 684-689, (2003)] DOI: https://doi.org/10.1063/1.1542540.