Hidayati, J., Sukardi, S., Suryani, A., Sugiharto, S., & Fauzi, A. M. (2014). Analysis of Productivity Improvement in the Palm Oil Plantation Revitalization of North Sumatera using Analytic Network Process. International Journal on Advanced Science, Engineering and Information Technology, 4(3), 162–168. https://doi.org/10.18517/ijaseit.4.3.392