1. Forschungszentrum Karlsruhe Heck D, Knapp J (1998) Upgrade of the Monte Carlo code CORSIKA to simulate extensive air showers with energies > 10**20-eV. FZKA-6097 Forschungszentrum Karlsruhe.
2. COSMOS: Monte Carlo simulation code for propagation of cosmic rays in the atmosphere and near earth environment, http://cosmos.n.kanagawa-u.ac.jp/cosmosHome/ Jun. 1, 2015
3. Cosmoclimatology: a new theory emerges;H Svensmark;Astron Geophys,2007
4. Testing the proposed causal link between cosmic rays and cloud cover;T Sloan;Environ Res Lett,2008
5. Can cosmic rays affect cloud condensation nuclei by altering new particle formation rates?;JR Pierce;Geophys Res Lett,2009