1. https://www.arianespace.com/wp-content/uploads/2015/09/Vega-Users
2. Manual_Issue-04_April-2014.pdf
3. https://www.arianespace.com/wp-content/uploads/2015/10/Soyuz-UsersMan
4. uel-issue2-Revision1-May18.pdf
5. https://www.arianespace.com/wp-content/uploads/2016/10/Ariane5-users