https://en.m.wikipedia.org/wiki/Orel_(spacecraft)

http://www.russianspaceweb.com/angara1.html

http://www.russianspaceweb.com/angara3.html

http://www.russianspaceweb.com/angara5m.html

http://www.russianspaceweb.com/angara5p.html

http://www.russianspaceweb.com/angara5_kvtk.html

http://www.russianspaceweb.com/angara5v.html

http://www.russianspaceweb.com/angara7.html