- http://iris.paho.org/xmlui/bitstream/handle/123456789/49449/CE162-INF-16-e.pdf?sequence=1&isAllowed=y%20=%20EN
- https://iris.paho.org/bitstream/handle/10665.2/49703/CD56-INF-18-s.pdf?sequence=2&isAllowed=y
- https://iris.paho.org/bitstream/handle/10665.2/49703/CD56-INF-18-p.pdf?sequence=4&isAllowed=y
- https://iris.paho.org/bitstream/handle/10665.2/49703/CD56-INF-18-f.pdf?sequence=3&isAllowed=y