Nugraha, Sapta, and Aditya Tama Caesar. 2016. “Analisis Kinerja Sistem Doppler VHF Omnidirectional Range Dan Distance Measuring Equipment Pada Navigasi Penerbangan”. Jurnal Sustainable: Jurnal Hasil Penelitian Dan Industri Terapan 5 (2):6-10. https://doi.org/10.31629/sustainable.v5i2.367.