M. Rodriguez, S. Luque, J. R. Alvarez and J. Coca, “A Comparative Study of Reverse Osmosis and Freeze Concentration for the Removal of Valeric Acid from Waste-water,” Desalination Journal, Vol. 127, No. 1, 2000, pp. 1-11. http://dx.doi.org/10.1016/S0011-9164(99)00187-3
 J. N. Shena, D. D. Li, F. Y. Jianga, J. H. Qiua and C. J. Gaob, “Purification and Concentration Of Collagen By Charged Ultrafiltration Membrane Of Hydrophilic Polyacrylonitrile Blend,” Separation and Purification Technology, Vol. 66, No. 2, 2009, pp. 257-262.
 O. Miyawaki, L. Liu, Y. Shirai, S. Sakashita and, K. Kagitani, “Tubular Ice System for Scale-Up of Progressive Freeze-concentration,” Journal of Food Engineering, Vol. 69, No. 1, 2005, pp. 107-113.
 Y. Shirai, T. Sugimoto, M. Hashimoto, K. Nakanishi and R. Matsuno, “Mechanism of Ice Growth in a Batch Crystallization with an External Cooler for Freeze Concentration,” Agricultural and Biological Chemistry, Vol. 51, No. 9, 1987, pp. 2359-2366.
 F. G. F. Qin, X. Yang and M. Yang, “An Adhesion Model of the Axial Dispersion in Wash Columns of Packed Ice Beds,” Separation and Purification Technology, Vol. 79, No. 3, 2011, pp. 321-328.
 C. Cojocaru and M. Khayet, “Sweeping Gas Membrane Distillation of Sucrose Aqueous Solutions: Response Surface Modeling and Optimization,” Separation and Purification Technology, Vol. 81, No. 1, 2011, pp. 12-24.
 I. A. W. Tan, A. L. Ahmad and B. H. Hameed, “Preparation of Activated Carbon from Coconut Husk: Optimisation Study on Removal of 2,4,6-Trichlorophenol Using Response Surface Methodology,” Journal of Hazardous Material, Vol. 153, No. 1-2, 2008, pp. 709-717.
 L. D. Montgomery, R. W. Montgomery and R. Guisado, “Rheoencephalographic and Electroencephalographic Measures of Cognitive Workload: Analytical Procedures,” Biological Psychology, Vol. 40, No. 1-2, 1995, pp. 143-159.
 H. Lee, M. Song and S. Hwang, “Optimising Bioconversion of Deproteinated Cheese Whey to Mycelia of Ganoderma Lucidum,” Process Biochemistry, Vol. 38, No. 12, 2003, pp. 1685-1693.
 N. M. Sachindra and N. S. Mahendrakar, “Process Optimization for Extraction of Carotenoids from Shrimp Waste with Vegetable Oils,” Bioresource Technology, Vol. 96, No. 10, 2005, pp. 1195-1200.
 Z. Erbay and F. Icier, “Optimisation of Hot Drying of Olive Leaves Using Response Surface Methodology,” Journal of Food Engineering, Vol. 91, No. 4, 2009, pp. 533-541. http://dx.doi.org/10.1016/j.jfoodeng.2008.10.004
 R. V. Muralidhar, R. R. Chirumamila, R. Marchant and P. Nigam, “A response Surface Approach for the Comparison of Lipase Production by Candida Cylindriea Using Two Different Carbon Sources,” Biochemical Engineering Journal, Vol. 9, No. 1, 2001, pp. 41-45.