books.google.it - This book provides a concise but broad overview of the engineering, science and flight history of planetary landers and atmospheric entry probes designed to explore the atmospheres and surfaces of other planets. It covers engineering aspects specific to such vehicles which are not usually treated in...http://books.google.it/books/about/Planetary_Landers_and_Entry_Probes.html?hl=it&id=cyehD1KsTKoC&q=Phobos&utm_source=gb-gplus-sharePlanetary Landers and Entry Probes