[1] Borooah G, Diesl A J, Dorsey T J. Strongly clean triangular matrix rings over local rings. J Algebra, 2007, 312: 773--797

[2] Borooah G, Diesl A J,  Dorsey T J. Strongly clean matrix rings over commutative local rings. J Pure Appl Algebra, 2008,  212:  281--296

[3] Chen H. On strongly J-clean rings. Comm Algebra, 2010, 38:  3790--3804

[4] Chen H. Rings Related Stable Range Conditions.Series in Algebra 11. Hackensack, NJ: World Scientific, 2011

[5] Chen H. Strongly nil clean matrices over R[x]/(x^2-1). Bull Korean Math Soc, 2012, 49:  589--599

[6] Chen J, Yang X, Zhou Y. When is the 2×2 matrix ring over a commutative local ring strongly clean? J Algebra, 2006, 301:  280--293

[7] Fan L, Yang X. A note on strongly clean matrix rings. Comm Algebra, 2010, 38:  799--806

[8] Fan  L, Yang X. On strongly clean matrix rings. Glasgow Math J, 2006, 48:  557--566

[9] Lee T K, Zhou Y. A class of exchange rings. Glasgow Math J, 2008, 50:  509--522

[10] Li Y. Strongly clean matrix rings over local rings. J Algebra, 2007, 312:  397--404

[11] Nicholson W K. Strongly clean rings and Fitting's lemma. Comm Algebra, 1999, 27: 3583--3592

[12] Nicholson W K, Zhou Y Q. Clean rings: a survey//Huynh D V, et. Advances in Ring Theory. Hackensack, NJ: World Sci Publ, 2005:  181--198

[13] Yang X, Zhou Y. Strong cleanness of the 2×2 matrix ring over a general local ring. J Algebra, 2008, 320:  2280--2290