Virgana, Stephanie, et al. “Effect of Molybdenum Addition in Nickel-Based Catalyst on Hydrogenation Reaction of 2-Ethyl-2-Hexenal Hydrogenation to 2-Ethyl-Hexanol”. International Journal of Engineering & Technology, vol. 7, no. 4, Sept. 2018, pp. 2006-8, https://doi.org/10.14419/ijet.v7i4.15319.