1. CONSOLMAGNO, G.J., PLANETARY SATELLITES: 452 (1977).
2. FANALE, F.P., PLANETARY SATELLITES: 379 (1977).
3. VOLCANISM EASTERN SN 1977
4. KUIPER, G.P., COMMUN LUNAR PLANET 10: 28 (1973).
5. LEBOFSKY, L.A., BULLETIN OF THE AMERICAN ASTRONOMICAL SOCIETY 4: 362 (1972).