[1]de Jager E M， Jiang Furu. The Theory of Singular Perturbation. A msterdam: NorthHolland Publishing Co., 1996

[2]Butuzov V F, Nefedov N N, Schneider K R. Singularly perturbed elliptic p roblems in the case of exchange of stabilities. J Differential Equations, 2001, 169:373-395

[3]Kelley W G. A si ngular perturbation problem of Carrier and Pearson. J Math Anal Appl, 2001, 255:678-697

[4]Glizer V Y, Fridman E A. Control linear singularly perturbed systems wit h small state delay. J Math Anal Appl, 2000, 250(1): 49-85

[5]Struckmerer J, Unterreiter A. On a recursive approximation of singularly perturbed parabolic equations. J Math Anal Appl, 2000, 250(1): 245-265

[6]Bohé A. The shock location for a class of sensitive boundary value problems. J Math Anal Appl, 19 99, 235: 295-314

[7]Ouyang Cheng. Singular perturbation of nonlinear Robin problem with multi ple solution. 应用数学，2002, 15(3): 149-153

[8]欧阳成，莫嘉琪. 一个非线性方程转向点问题. 应用数学，2001, 14(2): 6-7

[9]Mo Jiaqi， Ouyang Cheng. A class of singularly perturbed generalized boun dary value problems for quasilinear elliptic equation of higher order. Appl Math Mech, 2001, 22(3): 372-378

[10]Mo Jiaqi， Ouyang Cheng. A class of nonlocal boundary value problems of nonlinear elliptic systems in unbounded domains. Acta Mathematica Scientia, 200 1, 21B(1): 93-97

[11]Chang K W, Howes F A. Nonlinear Singular Perturbation Phenomena: Theory and Application. Applied Mathematical Science,New York: SpringerVerlag, 1984. 56