Schultz, Martin G. The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
https://orbit.dtu.dk/en/publications/ris%C3%B8-energy-report-3-hydrogen-and-its-competitors (Publisher version)
Schultz, M. G., Markert, F., & Pilegaard, K. (2004). Hydrogen and the environment. In H. Larsen, R. Feidenhans, L. S. Petersen, & Risø National Laboratory (Eds.), Hydrogen and its competitors (pp. 58-62). Risø: Risø National Laboratory.