Ahmad, S.; Kroon, D.; Rigby, S.; Hanif, M.; Imraz, M.; Ahmad, T.; Jan, I. U.; Ali, A.; Zahid, M.; Ali, F. Integrated Paleoenvironmental, Bio- and Sequence-Stratigraphic Analysis of the Late Thanetian Lockhart Limestone in the Nammal Gorge Section, Western Salt Range, Pakistan. jhes 2014, 47, 9-24.