GUTMAN, Ivan. Spectrum and energy of the Sombor matrix. Vojnotehnički glasnik / Military Technical Courier, [S. l.], v. 69, n. 3, p. 551–561, 2021. DOI: 10.5937/vojtehg69-31995. Dostupno na: https://asistent.ceon.rs/index.php/vtg/article/view/31995. Pristupljeno: 12 jul. 2026.