Biele, J.; et al. In-situ analysis of Europa ices by melting probes(PDF). Proceedings of the International workshop “Europa lander: science goals and experiments” Space Research Institute (IKI), Moscow, Russia. [2012-02-25]. (原始内容存档(PDF)于2012-04-15). 引文格式1维护:显式使用等标签 (link)
Gowen, R.A. et a. Penetrators for Europa(PDF). Proceedings of the International workshop “Europa lander: science goals and experiments” Space Research Institute (IKI), Moscow, Russia. [2012-02-25]. (原始内容存档(PDF)于2012-02-25).
Gowen, R.A. et a. Penetrators for Europa(PDF). Proceedings of the International workshop “Europa lander: science goals and experiments” Space Research Institute (IKI), Moscow, Russia. [2012-02-25]. (原始内容存档(PDF)于2012-02-25).
Biele, J.; et al. In-situ analysis of Europa ices by melting probes(PDF). Proceedings of the International workshop “Europa lander: science goals and experiments” Space Research Institute (IKI), Moscow, Russia. [2012-02-25]. (原始内容存档(PDF)于2012-04-15). 引文格式1维护:显式使用等标签 (link)