LUBIS, A. I. U. . Study Of The Effectiveness Of The Use Of Gypsum And Volcanic Ash On Stability Of The Clay Soil Based On The CBR Value And The Unconfined Compression Test. Jurnal Mekintek : Jurnal Mekanikal, Energi, Industri, Dan Teknologi, [S. l.], v. 12, n. 2, p. 37–45, 2021. DOI: 10.35335/mekintek.v12i2.26. Disponível em: https://ejournal.isha.or.id/index.php/Mekintek/article/view/26. Acesso em: 1 may. 2026.