@misc{indiciae3616a18ac02a, title = {Helium at nonzero temperatures: A variational density-matrix approach for Bose fluids.}, author = {G Senger and ML Ristig and KE Kürten and CE Campbell}, year = {1986}, doi = {10.1103/physrevb.33.7562}, url = {https://pubmed.ncbi.nlm.nih.gov/9938121/}, note = {Source identifier: 9938121} }