Sharifigaliuk, H. and Mahmood, S.M. and Ahmad, M. and Rezaee, R.  (2021) Use of Outcrop as Substitute for Subsurface Shale: Current Understanding of Similarities, Discrepancies, and Associated Challenges.  Energy and Fuels, 35 (11).  pp. 9151-9164.  ISSN 08870624