1. Hydrogen Market Research;Companhia Energética de São Paulo/FDTE,1984
2. Electrolytic Hydrogen Feasibility in Brazil;Campos,1984
3. Hydrogen Tomorrow-Demands and Technology Requirements;Kelley,1975
4. Equipamentos Villares S.A., private communication (1986).
5. Oxigênio do Brasil, private communication (1986).