"Masaaki Yoshifuji,Hiroki Sugiyama,Shigekazu Ito","Syntheses and Reactivity of Novel Unsaturated Cyclic Compounds Containing Phosphorus Atoms",,"J. Organomet. Chem.",,"vol. 690",,"p. 2515",2005,May
"Shigekazu Ito,Hideaki Miyake,Hiroki Sugiyama,Masaaki Yoshifuji","Reactivity of a Kinetically Stabilized 1,3,6-Triphosphafulvene toward Some Nucleophiles",,"Tetrahedron Lett.",,"vol. 45",,"p. 7019",2004,Oct.
"Shigekazu Ito,Hideaki Miyake,Hiroki Sugiyama,Masaaki Yoshifuji","Characterization of a 3,4-Dihydro-1,3,4-triphosphacyclopenta[a]indene as an Isomer of a Mes*-Substituted 1,3,6-Triphosphafulvene (Mes* = 2,4,6-tBu3C6H2)",,"Heterocycles",,"vol. 63",,"p. 2591",2004,May
"Hiroki Sugiyama,Shigekazu Ito,Masaaki Yoshifuji","Preparation and Reactions of 1,3-Diphosphacyclobutane-2,4-diyls That Feature an Amino Substituent and/or a Carbonyl Group",,"Chem. Eur. J.",,"vol. 10",,"p. 2700",2004,Mar.
"Shigekazu Ito,Hiroki Sugiyama,Masaaki Yoshifuji","Preparation of 2,4-Bis(2,4,6-tri-t-butylphenyl)-1,3-diphosphacyclobutenes from 2-(2,4,6-Tri-t-butylphenyl)-1-phosphaethyne and Alkyllithiums",,"Chem. Commun.",,,"No. 16","pp. 1744?1745",2003,Aug.
"Masaaki Yoshifuji,Shigekazu Ito,Hiroki Sugiyama","1,3,6-Triphosphafulvene Bearing Three Low-Coordinated Phosphorus Atoms",,"Phosphorus Sulfur Silicon Relat. Elem.",,"Vol. 168",,"pp. 315-319",2001,Oct.