1. Collin, R.E. 1966. Foundations for Microwave Engineering, McGraw-Hill Kogakusha, Ltd., Tokyo.
2. Cooper, L. and Steinberg, D. 1970, Introduction to methods of optimization. W. B. Saunders, Philadelphia: 166–168.
3. Moisan, M. and Pelletier, J. (Eds) 1992. Microwave Excited Plasmas. Elsevier Science Publisher B.V., Amsterdam: 473–490.