Rettberg, Petra ; Antunes, André ; Brucato, John Robert...
https://elib.dlr.de/126590/1/ME-SBA-2019-Rettberg-Biological%20Contamination%20Prevention%20for%20Outer%20Solar%20System%20Moons%20of%20Astrobiological%20Interest%20-%20What%20Do%20We%20Need%20to%20Know.pdf.  , 2019

Rettberg, Petra ; Brucato, John Robert ; Cabezas, Patricia...
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Walter, Nicolas ; Rettberg, Petra ; Fellous, Jean-Louis...
https://elib.dlr.de/106258/1/ME-SBA-2016-Rettberg-PPOSS-IAC.pdf.  , 2016

Walter, Nicolas ; Rettberg, Petra ; Fellous, Jean-Louis...
https://elib.dlr.de/105992/1/ME-SBA-2016-Walter-Rettberg-PPOSS-COSPAR%20PPP.pdf.  , 2016