Universitat Politècnica de Catalunya (Spain)

University College London (UK)

Telefónica Investigación y Desarrollo (Spain)

University of Macedonia (Greece)

Federal University of São Carlos

Federal University of São Carlos (Brazil)

Federal University of Uberlândia

Federal University of Uberlândia (Brazil)

Federal University of Pará

Federal University of Pará (Brazil)

Federal University of Rio Grande do Norte (Brazil)

CPqD Telecom Research and Development Center (Brazil)

Federal University of Goiás

Federal University of Goiás (Brazil)