Premonowati, P., Prastistho, B. and Firdaus, I. M. (2012) “Allostratigraphy of Punung Paleoreef based on Lithofacies Distributions, Jlubang Area, Pacitan Region-East Java”, Indonesian Journal on Geoscience, 7(2), pp. 113–122. doi: 10.17014/ijog.7.2.113 - 122.