Garg, V. K., & Wilkes, J. E. (1999). Principles and applications of GSM. Prentice Hall PTR.

Garg, Vijay Kumar, and Joseph E. Wilkes. Principles and Applications of GSM. Upper Saddle River, N.J. : New Delhi: Prentice Hall PTR, 1999.

Garg, Vijay Kumar, and Joseph E. Wilkes. Principles and Applications of GSM. Prentice Hall PTR, 1999.