| [1] | Ewing R E.Time-stepping Galerkin methods for nonlinear Sobolev partial-differential equations[J].SIAM J Numer Anal,1978,15(6):1125-1150. doi:  10.1137/0715075 | 
		
				| [2] | Nakao M T.Error estimate of a Galerkin method for some nonlinear Sobolev equations in one space dimension[J].Numer Math,1985,47(1):139-157. doi:  10.1007/BF01389881 | 
		
				| [3] | JIANG Zi-wen, CHEN Huan-zhen.Error estimates of mixed finite element methods for sobolevequation[J].Northeast Math,2001,17(3):301-314. | 
		
				| [4] | 郭玲,陈焕贞.Sobolev方程的H1-Galerkin混合有限元方法[J].系统科学与数学,2006,26(3):301-314. | 
		
				| [5] | Ciarlet P G. The Finite Element Method for Elliptic Problems[M].Amsterdam: North-Holland, 1978. | 
		
				| [6] | SHI Dong-yang,MAO Shi-peng, CHEN Shao-chun. An anisotropic nonconforming finiteelement with some superconvergence results[J].J Comput Math,2005,23(3):261-274. | 
		
				| [7] | LIN Qun,Tobiska L, ZHOU Ai-hui. Superconvergence and extrapolation of nonconforming low order finite elements applied to the Poisson equation[J].IMA J Numer Anal,2005,25(1):160-181. doi:  10.1093/imanum/drh008 | 
		
				| [8] | Hale J K.Ordinary Differential Equations[M].New York:Willey-Inter Science,1969. | 
		
				| [9] | 石东洋,谢萍丽,陈绍春.双曲积分微分方程的各向异性非协调有限元逼近[J].应用数学学报,2007,30(4):654-666. | 
		
				| [10] | 林群,严宁宁.高效有限元构造与分析[M].保定: 河北大学出版社,1996. | 
		
				| [11] | Heywood J G, Rannacher R. Finite element approximation of the nonstationary Navier-Stokes problem IV: Error analysis forsecond-order time discretization[J].SIAM J Numer Anal,1990,27(2):353-384. doi:  10.1137/0727022 | 
		
				| [12] | HE Yin-nian. Two-level method based on finite element and Crank-Nicolson extrapolation for time-dependent Navier-Stokes equations[J].SIAM J Numer Anal,2003,41(4):1263-1283. doi:  10.1137/S0036142901385659 | 
		
				| [13] | HE Yin-nian, SUN Wei-wei. Stability and convergence of the Crank-Nicolson/Adams-Bashforth scheme for the time-dependent Navier-Stokes equations[J].SIAM J Numer Anal,2007,45(2):837-869. doi:  10.1137/050639910 | 
		
				| [14] | HE Yin-nian, SUN Wei-wei. Stabilized finite element methods based on Crank-Nicolson extrapolation scheme for the time-dependent Navier-Stokes equations[J].Math Comp,2007,76(257):115-136. doi:  10.1090/S0025-5718-06-01886-2 |