Slamet, S., S. ., and I. Kusumaningtyas. “Effect of Composition and Pouring Temperature of Cu(20-24)wt.%Sn by Sand Casting on Fluidity and Mechanical Properties”. Journal of Mechanical Engineering and Sciences, Vol. 13, no. 4, Dec. 2019, pp. 6022-35, doi:10.15282/jmes.13.4.2019.20.0476.