"Shigekazu Ito,Manabu Kikuchi,Joji Miura,Noboru Morita,Masaaki Yoshifuji","Spectroscopic and stability studies on unsymmetrical 1,3-dialkyl-1,3- diphosphacyclobutane-2,4-diyls",,"Journal of Physical Organic Chemistry","Wiley","Vol. 29","No. 9","pp. 733-737",2012,Sept.
"Shigekazu Ito,Manabu Kikuchi,Hiroki Sugiyama,Masaaki Yoshifuji","Synthesis and Properties of Air-Stable 1,3-Diphosphacyclobutane-2,4-diyls and the Related Compounds",,"J. Organomet. Chem.",,"vol. 692",,"p. 2761",2007,May
"Shigekazu Ito,Manabu Kikuchi,Masaaki Yoshifuji,Anthony J. Arduengo, III,Tatyana A. Konovalova,Lowell D. Kispert","Preparation and Characterization of an Air-tolerant 1,3-Diphosphacyclobuten-4-yl Radical",,"Angew. Chem. Int. Ed.",,"vol. 45",,"p. 4341",2006,June