1. Radical concentration of kerogen as a maturation parameter;Bakr;Org. Geochem.,1988
2. Geological evaluation report on the well “MITI-Takadaheiya”;Japan National Oil Corporation,1986
3. Electron paramagnetic resonance in kerogen studies;Marchand,1980
4. ESR diagrams: a method to distinguish vitrinite macerals;Morishima;Geochim. Cosmochim. Acta,1978
5. How to evaluate potential gas and oil source;Pusey;World Oil,1973