Riittonen T., Toukoniitty E., Madnani D.K., Leino A.-R., Kordas K., Szabo M., Sapi A., Arve K., Wärnå J., Mikkola J.-P. One-Pot Liquid-Phase Catalytic Conversion of Ethanol to 1-Butanol over Aluminium Oxide-The Effect of the Active Metal on the Selectivity. 2012. Catalysts. 2. 1. 84. 10.3390/catal2010068.