Priyonggo B, Subrata IDM, Setiawan RPA. Rancang Bangun dan Pengujian Penetrometer Digital dengan Perekam Data Berbasis Android. JTEP [Internet]. 2019 Aug. 8 [cited 2026 Jan. 13];7(1):83-90. Available from: https://journal.ipb.ac.id/jtep/article/view/27059