C. M. Pichler, M. G. Al-Shaal,D. Gu, H. Joshi, W. Ciptonugroho, F. Schüth, "Ruthenium Supported on High-Surface-Area Zirconia as an Efficient Catalyst for the Base-Free Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid", Chemsuschem 2018, 11, 2083-2090 DOI:10.1002/cssc.201800448

M. Jablonska, W. Ciptonugroho, K. Gora-Marek, M. G. Al-Shaal, R. Palkovits, "Preparation, characterization and catalytic performance of Ag-modified mesoporous TiO2 in low-temperature selective ammonia oxidation into nitrogen and water vapour",Microporous Mesoporous Mater. 2017, 245, 31-44 DOI:10.1016/j.micromeso.2017.02.070

X. Yi, M. G. Al-Shaal, W. Ciptonugroho, I. Delidovich, X. Wang, R. Palkovits, "Synthesis of Butyl Levulinate Based on a-Angelica Lactone in the Presence of Easily Separable Heteropoly Acid Catalysts":, ChemSusChem 2017, 10, 1494-1500 DOI:10.1002/cssc.201601882

W. Ciptonugroho , M. G. Al-Shaal, J. B. Mensah, R. Palkovits, "One pot synthesis of WOx/mesoporous-ZrO2 catalysts for the production of levulinic-acid esters",J. Catal. 2016, 340, 17-29 DOI:10.1016/j.jcat.2016.05.001

M. G. Al-Shaal , W. Ciptonugroho, F. J. Holzhäuser, J. B. Mensah, P. J. C. Hausoul, R. Palkovits, "Catalytic upgrading of a-angelica lactone to levulinic acid esters under mild conditions over heterogeneous catalysts",  Catal. Sci. Technol 2015, 5, 5168-5173 DOI:10.1039/C5CY00446B