Nellis, W.J. «Metastable Metallic Hydrogen Glass». Lawrence Livermore Preprint UCRL-JC-142360, 2001. «minimum electrical conductivity of a metal at 140 GPa, 0.6 g/cm3, and 3000 K»[Enllaç no actiu]
nasa.gov
Silvera, Isaac F. «Metallic Hydrogen: A Game Changing Rocket Propellant». NIAC SPRING SYMPOSIUM, 27-03-2012. Arxivat de l'original el 2013-06-07. [Consulta: 13 maig 2012]. «Recombination of hydrogen atoms releases 216 MJ/kg Hydrogen/Oxygen combustion in the Shuttle releases 10 MJ/kg ... density about 12-13 fold»
Silvera, Isaac F. «Metallic Hydrogen: A Game Changing Rocket Propellant». NIAC SPRING SYMPOSIUM, 27-03-2012. Arxivat de l'original el 2013-06-07. [Consulta: 13 maig 2012]. «Recombination of hydrogen atoms releases 216 MJ/kg Hydrogen/Oxygen combustion in the Shuttle releases 10 MJ/kg ... density about 12-13 fold»