TY - JOUR A1 - Mebel, A. M.A1 - Kaiser, R. I.T1 - The Formation of Interstellar C_2N Isomers in Circumstellar Envelopes of Carbon Stars: An Ab Initio StudyJF - Astrophysical JournalY1 - 2002VL - 564SP - 787EP - 791ER -