- Sihombing, R., Johnson. W.D., Wilson, M.A, Johnson, M., Vassallo. A. M, Aldedice, D. (1991). “Origins of humus variation. Effects of Leaching and seasonal flooding”. Org. Geochem, 17: 85-91.
- Greenwood, P. F, Wilson, M. A., Sihombing, R. (1995) “Pyrolysis of size exclusion humic and fulvic acid soil fractio”. Procedding 15th conf. of Australian and New Zealand for Mass Spectrometry (ANZMS), La Trobe University, Australia
- Sihombing. R., Greenwood, P. F., Wilson, M.A., Hanna, J. V. (1996). “Molecular size distributions and nitrogen content in the swamp humic materials of myall lake area based on pyrolysis-gas chromatography and C-13 NMR”. Organic Geochemistty spectra, 24: 859-873.
- Yuwono, A.L, Sihombing, R., Krisnandi, Y.K., Sutarno, S., Handoko, Chitraningrum, N. (2010). “The application of tapanuli clay as nanofiller in nanocomposites: synthesis and their characterization”. International Journal of Modern Physics B, 24: 148-156
- Mulia, R.M, Kusnoputranto, H., Moersidik, S.S., and Sihombing, R. (2012) “Optimisation operational variable of bench scale biological flue gas desulfurisation application in sulfuric acid industry”. World Applied Sciences Journal, 18: 1310-1314.
- Irwansyah, Sihombing, R.,Suwarso, W.P. (2012).” Self-assembly and hydrogelation of peptide amphiphiles”. Makara Journal of Science, 16: 51-57
- Krisnandi, Y. K, Yusri S., Gotama, H.S., Octaviani, S., Sihombing, R. (2012). “Synthesis and characterization of hierarchical Co/ZSM-5 as catalyst for methane partial oxidation”. International Journal of Environment and Bioenergy, 3: 121-131
- Octaviani, S., Krisnandi, Y. K, Abdullah, I., Sihombing, R. (2012). “The effect of alkaline treatment to the structure of ZSM5 Zeolites”. Makara Journal of Science, 16: 155-162
- Sihombing, R., Krisnandi, Y.K., Widya. R., Luthfiyah, S.Z., Yunarti, R.T. (2015). “Adsorption of phosphate ion in water with lithium-intercalated gibbsite”. Makara Journal of Science, 19: 131-136
- Krisnandi. Y.K., Samodro, B.A., Sihombing, R., Howe, R.F. (2015) “Direct synthesis of methanol by partial oxidation of methane with oxygen over cobalt modified mesoporous H-ZSM-5 catalyst”. Indones. J. Chem., 15: 263 – 268.
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