Sulistyowati, T. and Muchtaranda, I.H. 2017. PENGARUH PENAMBAHAN SPENT CATALYST TERHADAP DAYA DUKUNG TANAH LEMPUNG EKSPANSIF YANG DISTABILISASI DENGAN FLY ASH: The Effect of Spent Catalyst Addition to the Bearing Capacity of the Expansive Clay Soil Stabilized by Fly Ash. Spektrum Sipil. 1, 2 (Aug. 2017), 202–211.