Lidyawati, D. E., I. Adha, and O. T. Purwadi. “Analysis of Supportive Lower Structure Building on Overpass Construction In The Sumatera Trans Toll Road”. Jurnal Rekayasa Sipil Dan Desain, vol. 8, no. 1, Feb. 2020, pp. Hal. 221 - 228, doi:10.23960/jrsdd.v8i1.1288.