Alvarez Guerrero, J., and F. O. Amaya Fernandez. “Impact of Linear and Nonlinear Effects in the Requirements of the Transmitter Linewidth for WDM-DPSK Systems”. Revista UIS Ingenierías, vol. 14, no. 2, June 2015, pp. 35-45, doi:10.18273/revuin.v14n2-2015004.