2,1=9; 2,2=10; 2,3=11; 2,4=12; 2,5=13; 2,6;14; 2,7=15; 3=6; 4,1=16; 4,2=17; 4,3=18; 6,1=40; 6,2=41; 6,3=42; 6,4=43; 6,5=44; 6,6=45; 6,7=46; 6,8=47; 6,9=48; 6,10=49; 6,11=50; 7,1=53; 7,2=54; 7,3=55; 7,4=56; 7,5=57; 8,1=64; 8,2=65; 8,3=66; 8,4=67; 8,5=68; 8,6=69 von: European Space Research Organization: Special publications
3=9; 9=32 von: Astrophysics and space science library (ISSN: 0067-0057)