TY  - RPRT
TI  - Solid helium. I. Ground-state energy calculated by a lowest-order constrained-variation method.
AU  - O Svorstol
AU  - E Ostgaard
PY  - 1986
DO  - 10.1103/physrevb.34.6192
UR  - https://pubmed.ncbi.nlm.nih.gov/9940497/
ID  - 9940497
ER  -