@article{CTT100583948,
  author = {Shigekazu Ito and Manabu Kikuchi and Hiroki Sugiyama and Masaaki Yoshifuji},
  title = {Synthesis and Properties of Air-Stable 1,3-Diphosphacyclobutane-2,4-diyls and the Related Compounds},
  journal = {J. Organomet. Chem.},
  year = 2007,
}

@article{CTT100609948,
  author = {Hiroki Sugiyama and Shigekazu Ito and Masaaki Yoshifuji},
  title = {Synthesis of a 1,3-Diphosphacyclobutane-2,4-diyl from Mes*C≡P (Mes* = 2,4,6-tBu3C6H2)},
  journal = {Angew. Chem. Int. Ed.},
  year = 2003,
}

@article{CTT100609979,
  author = {Shigekazu Ito and Hiroki Sugiyama and Masaaki Yoshifuji},
  title = {Isolation of a Kinetically Stabilized 1,3,6-Triphosphafulvene,},
  journal = {Angew. Chem. Int. Ed.},
  year = 2000,
}

@inproceedings{CTT100583979,
  author = {Shigekazu Ito and Hiroki Sugiyama and Masaaki Yoshifuji},
  title = {Synthesis and Characterization of Kinetically Stabilized 1,3-Diphosphacyclobutene Derivatives},
  booktitle = {Phosphorus Sulfur Silicon Relat. Elem.},
  year = 2004,
}

@inproceedings{CTT100609963,
  author = {Hiroki Sugiyama and Shigekazu Ito and Masaaki Yoshifuji},
  title = {Synthesis and Structure of a Kinetically Stabilized 1,3,6-Triphosphafulvene},
  booktitle = {Phosphorus Sulfur Silicon Relat. Elem.},
  year = 2002,
}