Soliman, S. S., & Srinath, M. D. (1998). Continuous and discrete signals and systems (2nd ed.). Prentice Hall.

Soliman, Samir S., and Mandyam D. Srinath. Continuous and Discrete Signals and Systems. 2nd ed. Upper Saddle River, NJ ; New Delhi: Prentice Hall, 1998.

Soliman, Samir S., and Mandyam D. Srinath. Continuous and Discrete Signals and Systems. 2nd ed. Prentice Hall, 1998.