Moniteur Belge, Law of 28 December 1977 approving the agreement between the government of the Kingdom of Belgium and the German Federal Republic for the joint realization of a research programme which could lead to industrial applications of methods for underground gasification of coal and lignite, signed in Brussels on 1 October 1976; 1978.
Patigny, Li, Chandelle Proc. 10th Underground Coal Gasification Symposium , Williamsburg, VA, USA; 1984, 43.
Richet, Bottinga, Javoy (1977) A Review of Hydrogen, Carbon, Nitrogen, Oxygen, Sulphur, and Chlorine Stable Isotope Fractionation Among Gaseous Molecules. Annual Review of Earth and Planetary Sciences 5:65.
Bottinga Géochim. Cosmochim. Acta 1969, 33:49.
Pirard Rev. Inst. Fr. Pét. 1980, 35:1025.
Marcourt, Pirard Ann. Mines Belgique 1980, 10:893.
Pirard ‘Proc. Second World Congress of Chemical Engineering’, Montréal, Canada , 2nd Edition; 1981, 2:449.
Marcourt, Paquay, Piel, Pirard Fuel 1983, 62:823.
Pirard, Coëme, Paquay, L'Homme Proc. International Chemical Reaction, Engineering Conference , Pune, India; 1984, 287.
