Chapters by Dr. Leopoldo Estrada Vargas

• Book Chapter An Introduction to VoIP: End-to-End Elements and QoS Parameters
  by H. Toral-Cruz, J. Argaez-Xool, L. Estrada-Vargas and D. Torres-Roman in the book "VoIP Technologies" edited by Shigeru Kashihara, ISBN 978-953-307-549-5, InTech, February 2, 2011