1. J.B. Callis, D.L. Illman and B.R. Kowalski, Anal. Chem.
59 (1987) 624A.
2. M.T. Rube and D.J. Eustace, Anal. Chem.
62 (1990) 65A.
3. N.C. Crabb and F. McLennan, Process Control Qual. 3 (1992) 229.
4. P. Van Vurren, Process Control Qual. 3 (1992) 101.
5. K.J. Clevett, Indust. Perspect. Control Instrumentation
26 (3) (1994) 29.