Collect. Czech. Chem. Commun.
1976, 41, 960-967
https://doi.org/10.1135/cccc19760960
The problem of spin contamination in UHF calculations for S = 1/2
J. Tiňo and V. Klimo
Collect. Czech. Chem. Commun.
1976, 41, 960-967
https://doi.org/10.1135/cccc19760960