@article{CTT100583950,
  author = {Masaaki Yoshifuji and Anthony J. Arduengo, III and Tatyana A. Konovalova and Lowell D. Kispert and Manabu Kikuchi and Shigekazu Ito},
  title = {Oxidation of 1,3-Diphosphacyclobutane-2,4-diyl with Ammoniumyl Antimonate and EPR Study of the Corresponding Cation Radical},
  journal = {Chem. Lett.},
  year = 2006,
}

@article{CTT100583954,
  author = {Shigekazu Ito and Manabu Kikuchi and Masaaki Yoshifuji and Anthony J. Arduengo, III and Tatyana A. Konovalova and Lowell D. Kispert},
  title = {Preparation and Characterization of an Air-tolerant 1,3-Diphosphacyclobuten-4-yl Radical},
  journal = {Angew. Chem. Int. Ed.},
  year = 2006,
}