1. Separation of Ethanol-Water MixtureUsing Type-A Zeolite Molecular Sieve
2. H. Wardono, T. G. Naiborhu, A. Y. E. Risano, M. D. E. S. Susila, and Amrizal. 2019. Comparison of Utilization of Physical Activated Coconut Shell and Rice Husk Charcoal to Save Fuel Consumption of a 4-Stroke Gasoline Motorcycle. Proceeding of SNTTM XVIII. Mechanical Engineering Department University of Trisakti. Jakarta
3. H. Wardono. 2012. Application of Coconut Shell Charcoal as Combustion Air Adsorbent to Enhance the Performance of a 4-Stroke Gasoline Motorcycle. Proceeding of SENTER PROBE 2012. Mechanical Engineering Department University of Lampung. Bandarlampung.
4. F. R. Ribeiro, et al., 1984, “Zeolites: Science and Technology”, Proceedings of the NATO ASI Series, The Netherlands.
5. H. V. Bekkum, et al., 1991. “Introduction to Zeolite Science and Practice”. Elsevier Science Publishers B.V., Netherlands.