Earth-Jupiter-Earth Trajectories and The Europa Ice-Clipper Mission
Trajectory Design for a Europa Orbiter Mission: A Plethora of Astrodynamic Challenges
Exploring Europa's Ocean: A Challenge for Marine Technology of this Century
(abstract) Searching for Ice and Ocean Biogenic Activity on Europa and Earth
A European planning strategy for air traffic to the year 2010
A European planning strategy for air traffic to the year 2010