Polinomial karakteristik matriks Antiadjacency dari Graf lingkaran berarah C n dan Graf lingkaran berarah dengan penambahan satu Chord C n t = Antiadjacency matrix characteristic polynomial of a directed cycle graph C n and directed cycle graph with one chord C n t (Universitas Indonesia. Fakulats Matematika dan Ilmu Pengetahuan Alam, 2014)