Block DM-03: Porovnání verzí

<ref name=rsw-n1d>{{cite web |url=http://www.russianspaceweb.com/n1_d.html |title=Block D upper stage |first=Anatoly |last=Zak |work=RussianSpaceWeb |date=1 July 2013 |accessdate=26 July 2013}}</ref>

<ref name=rsw-protonglonass49>{{cite web |url=http://www.russianspaceweb.com/proton_glonass49.html |title=Proton accident with GLONASS satellites |first=Anatoly |last=Zak |work=RussianSpaceWeb |date=1 July 2013 |accessdate=26 July 2013}}</ref>}}