1. Amin, R.W. (1987), "Variable Sampling Interval Control Charts", Ph.D. Dissertation, Virginia Polytechnic Institute and State University
2. Amin, R. W., Reynolds, M. R., Jr, and Arnold, J. C, "CUSUM Charts With Variable Sampling Intervals", Technical Report Number 87-2, Department of Statistics and Statistical Consulting Center, Virginia Polytechnic Institute and State University
3. Amin, R.W. and Ncube, M.M. (1990), "Variable Sampling Interval Combined Shewhart-Cumulative Score Quality Control Procedure", (to appear in Applied Statistics)
4. Amin, R. W. and Miller, R.W. (1990), "A Robustness Study of X Charts with Variable Sampling Intervals", Technical Report Number RA-90-001, Department of Mathematics and Statistics, University of West Florida, Pensacola
5. A Markovian Sampling Policy Applied to Water Quality Monitoring of Streams