1. Oil shale development in China;Qian;Oil Shale,2003
2. Economic evaluation, recovery techniques and environmental implications of the oil shale deposit in the Abakaliki Anticlinorium, southeastern Nigeria;Ehinola;Oil Shale,2005
3. Petroleum formation and occurrence;Tissot,1984
4. Unconventional oil and gas resource development – let’s do it right;Holditch;J Unconvent Oil Gas Resour,2013
5. Formation, distribution, potential and prediction of global conventional and unconventional hydrocarbon resources;Zou;Petrol Expl Develop,2015