Investigación original / Original research
Panam Salud Publica. 2016;39(1):38–43.
Regional Analysis. WPSAR Vol 7, No 2, 2016 | doi: 10.5365/wpsar.2015.6.4.010
Accessed online August 2018
ERJ Open Res 2017; 3: 00002-2017
World's largest Science, Technology & Medicine Open Access book publisher
Chapter 7 from the book People's Movements in the 21st Century - Risks, Challenges and Benefits