@article{CTT100574846,
  author = {Maho Nakata and Hiroshi Nakatsuji and Masahiro Ehara and Mituhiro Fukuda and Kazuhide Nakata and Katsuki Fujisawa},
  title = {Variational calculations of fermion second-order reduced density matrices by semidefinite programming algorithm},
  journal = {The Journal of Chemical Physics},
  year = 2001,
}