1. Die Verbreitung des Lebens im Weltenraum;Arrhenius;Die Umschau,1903
2. Studies on the effects of cosmic HZE-particles on different biological systems in the Biostack I and II flown on board of Apollo 16 and 17;Bücker,1975
3. The largest molecules in space: interstellar dust;Greenberg,1983
4. Approaching the interstellar grain organic refractory component;Greenberg;The Astrophys. J.,1995