Ahmad, Sajjad, et al. “Belemnite Biostratigraphy of the Upper Jurassic to Lower Cretaceous Strata in the Surghar Range, NW Pakistan: Systematic and Paleobiogeographic Implications”. Iranian Journal of Earth Sciences, vol. 13, no. 1, Jan. 2021, pp. 1-13, https://doi.org/10.30495/ijes.2021.678952.