Wijaya, N.A., Wijayati, N. and Cahyono, E. 2016. Catalytic Activity of Zr4+/ZA on The Isomerization Reaction of α-Pinene and It’s Reusability Test. Indonesian Journal of Physics and Nuclear Applications. 1, 3 (Oct. 2016), 157–165. DOI:https://doi.org/10.24246/ijpna.v1i3.157-165.