"Masaaki Yoshifuji,Anthony J. Arduengo, III,Tatyana A. Konovalova,Lowell D. Kispert,Manabu Kikuchi,Shigekazu Ito","Oxidation of 1,3-Diphosphacyclobutane-2,4-diyl with Ammoniumyl Antimonate and EPR Study of the Corresponding Cation Radical",,"Chem. Lett.",,"vol. 35",,"p. 1136",2006,Nov. "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