"A.A. Belik,M. Azuma,A. Matsuo,S. Okubo,H. Ohta,K. Kindo,M. Takano,Kaji","Crystal Structure and Properties of Phosphate PbCu2(PO4)2 with Spin-Singlet Ground State",,"Phys. Rev., 73",,"Vol. 73","No. 2","pp. 024429-1-024429-7",2006, "Kaji,S. Okubo,H. Ohta,Yuhji Inagaki,A.A. Belik,M. Azuma,M. Takano","High Field ESR Measurements of Spin Gap System MCu2(PO4)2",,"J. Phys. & Chem. Solids,",,"Vol. 66","No. 11","pp. 2068-2071",2005,