Kurniadi, K., A. J. Tontowi, and E. Wahyudi. “The Development of Space Surveillance Settlement Concept in Pesantren Gadingmangu Perak Jombang”. SPECTA Journal of Technology, vol. 1, no. 3, Nov. 2019, pp. 17-22, doi:10.35718/specta.v1i3.83.