F. D. Cahyadi, N. B. Sukoco, W. S. Pranowo, and K. Kamija, “Pembuatan Purwarupa Peta Contour Best Operation Depth Kapal Selam di Perairan Sangihe Talaud : Prototype of Contour Map of Best Operation Depth Submarine in Sangihe Talaud . Waters”, chartdatum, vol. 4, no. 2, pp. 87–94, Sep. 2022.