• [1]

    Ashtekar A.Phys.Rev.Lett.,1986,57(8):2244—2247[2] Ashtekar A.Phys.Rev.,1987,D36(6):1587—1602[3] Ashtekar A.New Perspectives in Canonical Gravity(with Invited Contributions).Napoli:Bibliopolis,1988[4] Modanese G.Phys.Rev.,1994,D49(12):6534—6542[5] DiBartolo C,Gambini R,Griego J.Phys.Rev,1995,D51(2):502—516[6] Rovelli C,Smolin L.Nucl.Phys.B,1990,331:80—152[7] Rovelli C,Smolin L.Nucl.Phys.B,1995,442:593—619[8] Loll R.Nucl.Phys.,1996,B460:143—154[9] SHAO ChangGui,CHEN ZhongGiu,MA WeiChuan et al.High Energy Phys.and Nucl.Phys.,(in Chinese)1998,22(2):117—121(邵常贵,陈中秋,马为川等.高能物理与核物理,1998,22(2):117—121)[10] CHEN ZhongQiu,SHAO ChangGui,MA WeiChuan.High Energy Phys.and Nucl.Phys.(inChinese),1998,22(3):217—224(陈中秋,邵常贵,马为川.高能物理与核物理,1998,22(3):217—224)[11] DiBartolo C,Gambini R,Griego J.Commun.Math.Phys.,1993,158:217—240[12] SHAO ChangGui,CHEN ZhongQiu,MA WeiChuanetal.Acta Mathematica Scientia,1996,16(2):162—169(邵常贵,陈中秋,马为川等.数学物理学报,1996,16(2):162—169)