[7] Joseph Sherma. Anal. Chem., 1988, 60: 74R.

[8] Joseph Sherma. Anal. Chem., 1990, 62: 255R.

[9] Joseph Sherma. Anal. Chem., 1992, 64: 134R.

[10] Joseph Sherma. Anal. Chem., 1994, 66: 67R.

[11] Joseph Sherma. Anal. Chem., 1996, 68: 1R.

[12] Joseph Sherma. Anal. Chem., 1998, 70: 7R.

[13] Joseph Sherma. Anal. Chem., 2000, 72: 9R.

[14] Joseph Sherma. Anal. Chem., 2002, 74: 2653.

[15] Joseph Sherma. Anal. Chem., 2004, 76: 3251.

[16] Joseph Sherma. Anal. Chem., 2006, 78: 3841.

[17] Joseph Sherma. Anal. Chem., 2008, 80: 4253.

[18] Somsen G W, Morden W, Wilson I D. Journal of Chromatography A, 1995, 703: 613.

[19] McCoy R N, Fiebig E C. Anal. Chem., 1965, 37: 593.

[20] Priscilla A Sturm, Parkhurst R M, Skinner W M. Anal. Chem., 1966, 38: 1244.

[21] Stahlmann S, et al. European Journal of Pharmaceutical Sciences, 2001, 12: 461.