1. Ahmad A, Alkarkhi AFM, Hena S, Siddique BM, Wai Dur K (2010) Optimization of Soxhlet Extraction of Herba Leonuri Using Factorial Design of Experiment. International Journal of Chemistry, 2:198–205
2. Box GEP, Hunter WG, Hunter JS (1978) Statistics for Experiments, John Wiley & Sons, Inc., New York
3. Cornell JA (2002) Experiments with Mixtures Design, Models and the Analysis of Mixture Data. John Wiley & Sons, Inc. New York
4. Eriksson L, Johansson E, Kettaneh-Wold N, Wikstrom C, Wold S (2008) D-optimal design. In: Eriksson L, Johansson E, Kettaneh-Wold N, Wikstrom C, Wold S, Design of Experiments Principles and Applications, MKS Umetrics AB, Stockolm Sweden, pp 217–230
5. Eriksson L, Johansson E, Kettaneh-Wold N, Wikstrom C, Wold S (2008) Additional optimization design for in regular regions. In: Eriksson L, Johansson E, Kettaneh-Wold N, Wikstrom C, Wold S, Design of Experiments Principles and Applications, MKS Umetrics AB, Stockolm Sweden, pp 201–215