Kim Phuong, Lieu, Altermann W., Drobek T., Frei M., and Stark R.W. 2015. “Pore and Grain Geometry Analysis of Sandstone Reservoir Rocks from a Well of a Northern German Basin”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 24 (4): 253-67. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/4712.