3Zuideveld Piet, De Graaf Jan. Overview of global solutions' world wide gasification developments [ A ]. In: Gasification Technologies Council.Gasification Technologies 2003 [ C ]. San Francisco California, 2003.1-7.
4Bayens C A. Update on projects using the shell coal gasification process[ A ]. In:Illinois Institute of Technology. Proceedings of the 55th Annual Meeting of the American Power Conference[ C ]. Chicago: Illinosis Inst of Technology, 1993.499 - 504.