et al., K. (2019) “Geometry, and Normal Modes of Vibration (3N-6) for Di and Tetra-Rings Layer (6, 0) Linear (Zigzag) SWCNTs; A DFT Treatment”, Baghdad Science Journal, 16(3(Suppl.), p. 0726. doi: 10.21123/bsj.2019.16.3(Suppl.).0726.